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Date submitted1912-06-10
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Date accepted1912-08-25
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Date published1912-12-01
I.I. Laguzen. Orbituary
- Authors:
- N. N. Yakovlev
On February 23, 1911, at the age of 65, the former director and honored professor of the Mining Institute, mining engineer Joseph Ivanovich Laguzen, died of a stroke. He did a lot of work on paleontology and geology of Russia. In paleontology, his works were varied, but were mainly devoted to the study and description of the fossil faunas of the Jurassic and Cretaceous systems. In 1887, he published good lithographed notes on the course of paleontology, and in 1895-1897 he published „A Short Course in Paleontology.” This is the first paleontology textbook published by a Russian professor. This work, in its significance, goes beyond the limits of the textbook, just as it went beyond the limits of the course taught at the Mining Institute. The article provides a list of scientific works of I. I. Laguzen from 1868 to 1891.
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Date submitted1912-06-07
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Date accepted1912-08-15
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Date published1912-12-01
Essay on the geological formations of the Udelnaya steppe of the Stavropol province
- Authors:
- K. A. Prokopov
In the summer of 1908, I was sent by the head of the Stavropol Land Management Party to the area of the Stavropol Udelnaya Steppe and its surrounding heights to collect material on the geological composition of the area and the possible research of its tectonics. The ultimate goal of these studies was to determine the possibility of extracting water in the Udelnaya Steppe by artesian drilling. In the attached essay, a detailed description of the outcrops is omitted and only their essential features are noted. On the map and section different numbers indicate the outcrop numbers and symbols show the geological horizons. The Ydel'naya steppe is located near the border of the Stavropol province and the Kuban region south of the city of Stavropol.
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Date submitted1912-06-02
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Date accepted1912-08-27
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Date published1912-12-01
Petrographic observations in the vicinity of the Miass plant
- Authors:
- A. N. Zavaritskii
In summer 1909 I undertook several petrographic excursions in the vicinity of the Miass plant, mainly to become familiar with the alkaline rocks developed in this area. The collected material was subjected to microscopic examination, which provided some data that, perhaps, will be useful for determininh the petrographic composition and structure of this area.
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Date submitted1912-06-22
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Date accepted1912-08-30
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Date published1912-12-01
Copper sulfate crystals and their structure
- Authors:
- D. N. Artem'ev
CuSO4 + 5H20 crystals have been studied by several authors. The most complete study of crystals of this compound was carried out relatively recently by Th. V. Barker in the laboratory of R. Groth. Copper sulfate crystals, as is known, belong to the cynacoidal class of the triclinic system. CuS04 + 5H20 crystallizes (at t° = - + 20°C) from an aqueous solution in very well-formed thick-table crystals. The article includes a diagram for the correct installation of crystals.
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Date submitted1912-06-11
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Date accepted1912-08-11
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Date published1912-12-01
Completing the derivation of canonical parallelohedra
- Authors:
- E. S. Fedorov
In the article „Parolleloëder in kanonischer Form und deren eindentige Beziehung zu Raumgittern” I developed the concept of parallelohedra in canonical form or simply canonical paradelohedrons, taking as the main thing the duality of the derivation of these parallelohedra from spatial lattices so that this conclusion was unambiguous. However, in this article I examined only one side of the question, related to these angular relationships of crystalline complexes, which, in accordance with the crystallographic law of limits, bring all crystallographic complexes in general closer to ideal types. They characterize the distribution of angles, which determines the belonging of these types to certain types of syngony, and in them the first role is played by right angles (see article).
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Date submitted1912-06-21
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Date accepted1912-08-21
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Date published1912-12-01
Identical spatial lattices for different symbols of the complex
- Authors:
- E. S. Fedorov
In the article “Paralleloëder in kanonischer Form und deren eindeutige Beziebung zu Raumgittern” I showed that by performing a monoclinic shift, you can always obtain an identical spatial lattice, and at the same time eventually you can reduce anorthogonality, that is why the expression for the probability of correct installation will increase, though the symbols of the shapes become more complex. But I did not dwell in detail on the criterion for exactly what shift the lattice remains identical. This is the explanation I want to make in this note.
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Date submitted1912-06-12
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Date accepted1912-08-13
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Date published1912-12-01
Crystallization of barite and the procedure for calculating the installation in general
- Authors:
- E. S. Fedorov
The more processed material is accumulated according to the calculation of correct installation, the more pronounced is the need to limit this calculation to the minimum number of important faces. Laboratory crystals are most often distinguished by the minimum number of developed forms. This was confirmed in the example of barite. Despite their appearance, which is almost no different from the usual appearance of many natural barite crystals, their combination is minimal and through this the first most important facets are especially emphasized.
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Date submitted1912-06-24
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Date accepted1912-08-02
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Date published1912-12-01
On a simple method for measuring the affinity between a solvent and a soluted body
- Authors:
- P. P. von-Weymarn
Let us have a unit volume of a solution of body X in some solvent Y; add to the solution of another solvent Z, which dissolves solvent Y well, but practically does not dissolve body X, even if solvent Z is mixed a little with solvent Y. Then solvent Z will begin to pull solvent Y out of the solution and body X should precipitate in crystals.
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Date submitted1912-06-23
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Date accepted1912-08-02
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Date published1912-12-01
Influence of the degree of dispersion of a crystalline solid on its melting point
- Authors:
- P. P. von-Weymarn
In my report on April 6, 1906, I wrote that the most important role in the process of melting dispersed systems is played by two factors: the degree of disruption of the continuity of the body and the associated change in the conditions of heat transfer, both before the melting process and during this process The degree of discontinuity affects, firstly, the latent heat of fusion, and secondly, together with the changed conditions of heat transfer, the softening of the solid system even before the start of melting. The surface layer of the crystal is chemically inhomogeneous, which affects the physical and physicochemical properties of the substance especially strongly at a high degree of dispersion.
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Date submitted1912-06-14
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Date accepted1912-08-01
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Date published1912-12-01
Heat recovery in factory furnaces and processes
- Authors:
- B. N. Pomerantsev
A furnace is a device that is capable of converting a known type of energy into thermal energy for use in a specific thermal process. We will only dwell a little on furnaces that heat rooms, muffle furnaces and steam boiler furnaces and will begin to study the factory furnaces themselves. See the author's conclusions in the article.
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Date submitted1912-06-29
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Date accepted1912-08-01
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Date published1912-12-01
Device for automatic rotation during the fall of a free-falling drilling tool
- Authors:
- B. G. Grigor'yants
The process of chiseling a rope with a non-free-falling tool that turns by hand is slow. The rope is greatly deteriorated and shortened by frequent extension and winding on spiders. The slowness of chiselling with such a tool, due to a non-free and weak blow, is further increased by the fact that it is necessary to build up the rope, wind and unwind it with each descent and ascent of the tool from the spider and, finally, replace from time to time the rope consisting of pieces with a solid one. All these shortcomings are eliminated if the tool itself is reset, giving a strong blow, and turns automatically, regardless of the rope, because in this case there is no need to separate the working part from the spare part and wind the rope around the spiders.
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Date submitted1912-06-13
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Date accepted1912-08-28
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Date published1912-12-01
Some rocks from the vicinity of the Tsarevo-Alexandrovsky mine in Miasskaya Dacha
- Authors:
- A. N. Zavaritskii
Regarding the petrography in the vicinity of the gold deposits of the Tsarevo-Alexandrovskaya distance of the Miass Dacha, which became famous especially due to the discovery of the largest of the Russian gold nuggets (2 paragraph 7 f. 92 z.), the information available in the literature is very scarce; for the most part it is only brief instructions. A geological map of this area, quite schematic, is given in the article. by mining Engineer Kulibin. The rocks are highlighted on it, but without their description. The author mainly lists the gold-bearing veins known at that time and dwells on some nuggets.
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Date submitted1912-06-06
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Date accepted1912-08-20
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Date published1912-12-01
Colloidal state and its significance for various branches of natural science
- Authors:
- P. P. von-Weymarn
I want to point out the importance of knowledge of the basic principles of colloid chemistry for other branches of natural science. Knowledge of them is necessary for a physicist, because a deep understanding of the doctrine of states of aggregation is impossible without a clear assimilation of the properties of dispersed systems. For a crystallographer and a mineral chemist, these basic principles of the study of colloids are no less important, because, when obtaining highly dispersed systems by crystallization, we are present at the birth of a crystal and monitor all its embryonic forms. The study of colloidal chemistry is even more important for representatives of the biological sciences, since the true cradle of nascent life is a typical complex disperse system—plasma.
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Date submitted1912-06-23
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Date accepted1912-08-13
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Date published1912-12-01
Ability for gelatinization and hydration
- Authors:
- P. P. von-Weymarn
In this article I want to share with readers some of the results of my experiments on the gelation of solutions, which, although they were obtained back in 1908, were not published in sufficient detail. In my work on the gelation of solutions, I came to the following four conclusions (see . article and tables). In conclusion, I want to draw attention to the fact that during the so-called “salting out” of organic colloids, the hydration capacity of the added salt plays a certain role, because, at least at a sufficiently high concentration, there must be a struggle between the salt and colloid molecules for the possession of hydration water.
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Date submitted1912-06-06
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Date accepted1912-08-05
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Date published1912-12-01
On the question of the nature of disperse systems
- Authors:
- P. P. von-Weymarn
In this article only dispersed systems will be considered: Liquid + Solid. Liquid + Liquid, moreover, in view of the identity of the characteristics of the three types into which classes a and b fall, I will limit myself to a more detailed analysis of the types of class a. Any dispersed system can be characterized by: 1. The magnitude and sign of the dispersing (or aggregating) force, 2. The degree of dispersion at a given moment, 3. The aggregate state of the dispersed phase. 4. The degree of contamination (adsorption) of the surface of the dispersed phase.
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Date submitted1912-06-20
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Date accepted1912-08-17
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Date published1912-12-01
Several simplified techniques for graphically solving crystallography problems
- Authors:
- E. S. Fedorov
This note contains neither any significant innovations nor any systematic solution to graphical issues. But with the widespread development of graphic solutions that crystallography has received recently, and especially with the introduction of crystal chemical analysis, the most insignificant simplification or reduction in techniques acquires very significant practical significance. Finally, some rules that lead to a reduction in graphic operations in a particular specialty, their applications only in certain, although numerous, cases, are inconvenient to place in elementary courses, where only the rules of the most general significance should be considered, and, moreover, presented systematically, so that students receive a valid ability to solve problems of all kinds, even if not always in the simplest way.
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Date submitted1912-06-21
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Date accepted1912-08-09
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Date published1912-12-01
Start of application of crystal chemical analysis
- Authors:
- E. S. Fedorov
In view of the fact that tables for this analysis have now been compiled, it was possible to begin the application of this scientific discipline. A total of 5 tables have been compiled, namely, all tetragonaloid crystals are divided into 3 tables according to structures (hexahedral, dodecahedral and octahedral), and in addition one table for hypohexagonal and trigonaloid crystals (for the latter, structures are noted only for ideal crystals due to their significant accumulation). In all tables, ideal crystals are highlighted in a special column, and it is for them we have the most dense arrangement of points, which is why, also bearing in mind the inevitable inaccuracies in the graphically obtained constants, for such crystals in particular we will have to compare the largest series of crystals.
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Date submitted1912-06-13
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Date accepted1912-08-23
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Date published1912-12-01
Pseudomorphosis of malachite after atacamite from the Bogoslovskii mining district
- Authors:
- Volume 3
Among the extremely valuable donations made to the museum of the Mining Institute, there is a specimen of false crystals of enormous size: currently composed mainly of malachite substance. From this specimen one could distinguish small tabular pseudomorphs that perfectly preserved their original shape, partly even with mirror-shiny edges . Thanks to this circumstance, the method of crystal chemical analysis could be applied with extreme clarity, so that it could be stated with complete certainty that these were pseudomorphs of atacamite. Using the tables of crystal chemical analysis, the entire series of substances was revised according to the symbol closest to that obtained from an approximate measurement, and the identity of the form turned out to be only for one substance, namely atacamite. These data are given in the note.
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Date submitted1912-06-05
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Date accepted1912-08-29
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Date published1912-12-01
Optical symbols of some minerals. Interference figures of mica
- Authors:
- V. I. Sokolov
The present paper presents the results of further investigations undertaken to determine the optical symbols of various minerals. The table provides the selected observations in mica plates. At the end of the article, more detailed data are provided regarding observations in simple and combined plates, as well as the characteristics of individual members of the group under consideration (muscovite, alomite, biotite, phlogopite, etc.).
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Date submitted1912-06-13
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Date accepted1912-08-16
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Date published1912-12-01
Enigmatic facets of quartz
- Authors:
- E. S. Fedorov
Enigmatic faces can practically be viewed as irrational, not allowed by the basic laws of crystallography. The assumption of their irrationality is also confirmed by their overgrowth upon contact with an important face of the complex, moistened with a saturated solution of the substance, and part of the last face is subject to dissolution. In addition to this characteristic, enigmatic facets are characterized by their isolation and uniqueness.
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Date submitted1912-06-20
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Date accepted1912-08-23
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Date published1912-12-01
Benitoite instead of apatite
- Authors:
- E. S. Fedorov
This amendment is made by me to the note “An interesting crystal of apatite, a satellite of neptunite from California.” (Notes of G.I. II 253) based on the written instructions of Dr. Slavik from Prague, who noticed my error based on the data from my own description, mainly pleochroism. Having tested the hardness, which turned out to be slightly higher than thsat of orthoclase, I can now declare the error that occurred with full conviction.
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Date submitted1912-06-02
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Date accepted1912-08-07
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Date published1912-12-01
Review of the work of P. P. v. Weymarn. "To the doctrine of states of matter"
- Authors:
- I. F. Shreder
Essay by v. Weymarn “To the Doctrine of the States of Matter” represents the first chapter of the work he conceived and partly already carried out on the structure of the material based on the data obtained by studying the so-called "colloidal" state of bodies. Weimarn discovered a universal way to obtain all kinds of crystalline substances (crystalloids) into the so-called colloidal and amorphous state forced him to put forward the position that both states are inherent in all bodies and depend only on the degree of fragmentation of the substance, and therefore on the relative development of the surface and that, further, there is no other difference between the crystalloid and colloid-amorphous state of the body, and make an attempt to revise our ideas about the nature of matter, based on the above principles.
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Date submitted1912-06-08
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Date accepted1912-08-26
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Date published1912-12-01
Barite from Zigazinskaya dacha (Southern Urals)
- Authors:
- A. N. Zavaritskii
I found this mineral in its entirety in slightly rounded pebbles up to half a fist in size, consisting of barite with a small inclusion of leaded sheen, in the bed of the Narataya River, two miles southwest of the Narataevsky iron mine. The barite of these pebbles forms a medium-grained to coarse-grained aggregate, which is indivisible, often located, being elongated in one direction, so that a somewhat layered composition is formed.
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Date submitted1912-06-05
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Date accepted1912-08-19
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Date published1912-12-01
Changes in the side rocks of the Zyryanovskoe Field
- Authors:
- A. N. Zavaritskii
All available samples contain inclusions of ore minerals in greater or lesser quantities: pyrite, zinc blende and partly lead luster. This clearly indicates that they were taken in the immediate vicinity of the ore sequence. The spatial location of these samples is clear from the attached diagram. As is known, the Zyryanovskoe deposit is a rather irregularly branched jelly-like mass.
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Date submitted1912-06-28
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Date accepted1912-08-17
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Date published1912-12-01
Crystallization of some similar organic cobaltammines
- Authors:
- D. N. Artem'ev
When crystallization is accelerated by cooling the initially heated solution, the crystals of these compounds begin to take on an increasingly needle-like appearance. The crystals of the iodide compound are so small (no more than 1/2 mm in length) that their goniometric study seems extremely difficult and I preferred not to do it, especially since this compound very easily decomposes in solution. Crystals of the chloride compound have already been described earlier. However, after the final clarification by E. S. Fedorov of the principles of correct installation, the symbols of the faces of these crystals should be changed according to the transition determinant (see article).
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Date submitted1912-06-05
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Date accepted1912-08-28
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Date published1912-12-01
Significant improvement in graphical designs, triangular and tetrahedral
- Authors:
- E. S. Fedorov
In the last article “Chemical relations of rocks and their graphic representation” I focused on the tetrahedral representation method, which I proposed even earlier, as the most perfect and simple method. And at the present moment, with a view to further simplifying the same method, I focus on it as the most perfect. Thus, the purpose of this note is not to consider theoretical issues using this method, which I did in the mentioned article, but there is not even a thought to introduce any change in its applications. Everything that is developed in this article remains equally correct for me at the present moment. Now I only mean to show that the method proposed then can be applied in a wide variety of forms and to choose from them exactly the one that is associated with the simplest operations.
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Date submitted1912-06-01
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Date accepted1912-08-28
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Date published1912-12-01
Relative determinants of birefringence of a biaxial crystalline substance
- Authors:
- E. D. Stratanivich
The points on the proposed diagram (see article) constructed from the examples just presented are distributed, as at least directly visible, in some harmonious order, along an arc, and it becomes possible to predict from it the relationships between the properties of yet undiscovered biaxial minerals; it is very likely that for such minerals, the relative determinants of their birefringence will be given when plotting on a diagram by points distributed between already known points on the same arc of our diagram. Consequently, and vice versa: taking any point along with those already known on this arc, we can expect that it corresponds to an as yet unknown mineral, and from the found determinants we can calculate the value of the angle of the optical axes based on the known formulas that were given at the beginning of this articles.
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Date submitted1912-06-19
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Date accepted1912-08-24
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Date published1912-12-01
On the electrical conductivity of metal alloys in connection with electronic theory
- Authors:
- N. I. Stepanov
A method has been developed for the preparation of alloy preparations suitable directly, without further mechanical treatment, for measuring electrical conductivity; this is especially important for brittle and easily oxidized alloys. The electrical conductivity and its temperature coefficient were measured for five alloy systems with clearly defined compounds, the nature of which was precisely established, by means of various metallographic methods. Existing theories of electrical conductivity of alloys are analyzed. An attempt has been made to theoretically explain the differences in the properties of the temperature coefficient of certain compounds and solid solutions, which are not provided by the existing theories.
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Date submitted1912-06-01
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Date accepted1912-08-08
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Date published1912-12-01
Theorems related to the Monge and Ampere equation
- Authors:
- I. P. Dolbnya
Differential equations are considered in relation to theorems related to the Monge and Ampere equations (see article).
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Date submitted1912-06-09
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Date accepted1912-08-26
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Date published1912-12-01
On curves of equal position of a point with a direct intersection
- Authors:
- V. I. Bauman
These curves can serve as a guide when choosing a combination of points that is advantageous for direct intersection, and in this regard, they seem to be more rational than those shown in the diagram, 2 curves of equal accuracy. The latter curves retain their value for graphical or mechanical balancing of the position of a point determined from more than two points. In this case, using these curves, we can easily determine all the definitions of a point corresponding to a given combination and can take it into account when deriving the balanced value of the coordinates of the latter.
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Date submitted1912-06-09
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Date accepted1912-08-15
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Date published1912-12-01
The mysticism of the Feuerbach circle (Circulus mysticus Feuerbachi)
- Authors:
- E. S. Fedorov
If a trigon ABC is given and we define the height point D in it (that is, the common point of intersection of the perpendiculars from its vertices to opposite sides), then ABCD can be taken as complete quadrangles with pairs of opposite sides AB with CD, BC with DA and CA with BD . Drawing a circle through the bases (a1, b1, c1) of the perpendiculars on the sides of the triangle, we obtain a Feuerbach circle, which, in addition to these three points, will pass through six more midpoints of the just listed sides of the complete quadrilateral, that is, points a1, b1, c1, a'1, b'1, c'1.
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Date submitted1912-06-21
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Date accepted1912-08-26
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Date published1912-12-01
About special circles and spheres
- Authors:
- E. S. Fedorov
In my article on the system of spheres, I outlined their linear and spherical aggregates, the collinear and reciprocal transformation of these aggregates, but did not touch at all the special circles found in each of their linear patterns. It was only implied that among all the circles of such a prima there is a circle of infinitely large radius , and such a circle is a straight line constituting the radical axis of the prima. As if in contrast to this, in the scientific literature, starting with Shteiner, it is understood that in the linear example of circles the special one is not a straight line, but a pair of straight lines, one of which is the radical axis, and the other is the infinitely distant straight line; but I am not aware that the question of special circles has been specifically discussed anywhere. With this note I intend to fill this gap.
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Date submitted1912-06-15
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Date accepted1912-08-24
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Date published1912-12-01
Spherical sets of curves of the 2nd order (conoprim)
- Authors:
- E. S. Fedorov
Let us consider systems of curves of the 2nd order (conoprim). In the system of synonyms of points, circles can be taken as extraelements, because these elements constitute a special system in themselves, and at the same time, any curve with a circle defines a linear prima. In general, in a linear prime there is no such extra element, but only in a linear second. However, you can make a linear second from the linear prima of ordinary (not vector) circles and some other conoprim. Such a linear second, however, will already be special, and therefore should be considered as a special system, and such a system will be related to the system of points on the plane, and the circles of the first must be projective in a special way to the infinitely distant points of the latter. Also, if we compose a linear third from some linear second of circles and some other conoprime, then such a system will be related to the system of points in space. But all these will be special, special systems of connotation points.
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Date submitted1912-06-11
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Date accepted1912-08-25
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Date published1912-12-01
About systems whose linear prims are determined by three elements
- Authors:
- E. S. Fedorov
If it is impossible to unambiguously determine an infinite set of rays from arbitrarily given two of them, then this can be achieved from arbitrarily given three of them. It is well known from elementary manuals that with three arbitrary given lines, and, moreover, non-intersecting lines, one can completely and unambiguously determine a certain unisexual hyperboloid. Since this curved surface of the 2nd order consists not of one, but of two systems of non-intersecting straight lines, it is clear that from the three straight lines only one of them is directly determined, which includes three data, and then it is logically inevitable to also accept the other a collection that occupies a position in space identical to the first system, that is, the surface of a unisexual hyperboloid.
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Date submitted1912-06-14
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Date accepted1912-08-12
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Date published1912-12-01
To the description of meteorites from Augustinovka, Petropavlovsk and Tubila
- Authors:
- A. E. Kupffer
The descriptions of the named meteorites available in the scientific literature are based on insufficient material from large collections of meteorites and require more detailed characterization. The distribution of the main masses of these meteorites, currently located in the museum of the Mining Institute, made before, was highly imperfect and did not allow for a detailed and complete description of them; pieces of them, partly including the huge main piece of the Augustinovka meteorite, left without a special care, became covered with thick layer of rust.
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Date submitted1912-06-21
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Date accepted1912-08-17
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Date published1912-12-01
Effect of solution layer thickness on crystallization
- Authors:
- E. S. Fedorov
In the "Annaks of Geology and Mineralogy of Russia", in the article on “Crystallization in a solid medium,” I already described the experience of converting polyhydrate magnesium sulfate hydrate, directly formed during the evaporation of the solution, into heptahydrate. At the same time, I noted that the rapidly growing needles and fibers of heptahydrate hydrate with apparently they spread at the same speed both in a free solution and penetrate the crystals of a polyhydrate hydrate (namely MgS0₄ 12 aq). It must be assumed that such an extreme slowdown in the progress of the phenomenon in extra-thin layers occurs under the influence of partial capillary forces of extension between the walls of the wedge space and its contents.
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Date submitted1912-06-04
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Date accepted1912-08-17
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Date published1912-12-01
A note on Bekke's method for comparing the refractive index values of neighboring mineral grains in thin sections
- Authors:
- A. N. Zavaritskii
This method, proposed by Bekke in 1893, has become widespread. As is known, it is based on observing the movement of a light strip that appears when using strong lenses at the boundary of neighboring mineral grains, if you move the microscope tube, focusing it either on the upper (upper setting) or on the lower surface of the section (lower setting).
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Date submitted1912-06-19
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Date accepted1912-08-05
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Date published1912-12-01
Symmetry of linear sets of curves of the 2nd order (conoprims)
- Authors:
- E. S. Fedorov
It is clear that the complete set, that is, the fifth of conoprims, has the highest possible symmetry, that is, circular symmetry. The symmetry of quarts is completely determined by the symmetry of one conoprim, because from it it is completely and unambiguously derived. Therefore, in the general case, such a set has a double axis of symmetry and two perpendicular planes of symmetry (rhombic type of symmetry on a plane). In the special case of a parabola, only the plane of symmetry remains (the hemirhombic type of symmetry). The circle has absolutely exceptional symmetry, and therefore there are linear quarts that have circular symmetry. From here we conclude that if, to define a linear quart, we take an arbitrary conoprime and a fivefold axis of symmetry, from which five equal ones are derived, then we obtain a quart with circular symmetry. All the curves contained in it in all positions are arranged in continuous circles of equal elements.
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Date submitted1912-06-19
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Date accepted1912-08-03
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Date published1912-12-01
Same-sex hyperboloids and generalization of their concept using the example of the conoprim system
- Authors:
- E. S. Fedorov
If it turned out that by choosing one linear prima in one diametrical second and then arbitrarily another linear prima in an arbitrary other second and thus constructing an infinite number of hyperboloids, we would obtain that the totality of such hyperboloids lies in one third located in one third , located in one linear quart, then we would be dealing with an image representing a generalization of the concept of a hyperboloid; we could call such a hyperboloid a hyperboloid of the 4th stage system. The special third, which has the symmetry of a circle, just indicated in the article (“Symmetry of linear sets of conoprims”) is such a generalized hyperboloid in the conoprim system. Since in this system, which treats a completely different topic, it would be inappropriate to dwell on the consideration of this issue in all details, this note has been dedicated specifically for this purpose.
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Date submitted1912-06-10
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Date accepted1912-08-28
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Date published1912-12-01
More about the remarkable properties of a special cyclide
- Authors:
- E. S. Fedorov
As is known, the French mathematician Dupin used the name cyclides to refer to curious surfaces that can be defined as being encircled by the set of all balls tangent to three data. These surfaces are extremely diverse and stand out for their many simple properties. studied both by the author himself and by some other mathematicians. They have two special axes, and if you rotate a plane around these axes, it will cut the surface in a continuous series of circles, which is why this surface can also be imagined as the trace of a circle moving according to a well-known law, at all points perpendicular to all circles of another similar system . All properties of cyclides are set out in my manual “New Geometry as the Basis of Drawing” (101). But here, in addition, a special cyclide with extremely interesting properties was derived.
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Date submitted1912-06-22
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Date accepted1912-08-10
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Date published1912-12-01
From the results of a trip to the Theological District in the summer of 1911
- Authors:
- E. S. Fedorov
There is absolutely no indication that the ore-bearing conditions, which in any case are evident here, will cease with the places of previous mining operations. True, there is no reason to assert that we will certainly encounter rich ore deposits here; but it must be said that everywhere and even in other places, no matter how favorable the observed conditions may be, it is risky to make positive statements, but in the conditions drawn by a compiled geological map, it is more likely to assume favorable rather than unfavorable results. The Nikolo-Podgornyi mine occupies a very special position. From a geological point of view, it is one of the most interesting points in the area, both for the distinctness in the development of the rocks, their complete exclusivity among others, and for the unexpectedness and novelty of the rocks themselves and the geological conditions in which they were formed.
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Date submitted1912-06-20
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Date accepted1912-08-29
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Date published1912-12-01
On the electrical conductivity of metals and their alloys from the point of view of dispersoid chemistry
- Authors:
- P. P. von-Weymarn
One of the main provisions of dispersoid chemistry is the statement that all properties, both physical and chemical, are functions of the degree of dispersion of a given disperse system. The author considers the following issues: 1) The effect of increasing the degree of dispersion on the electrical conductivity of chemically pure metals; 2) The influence of the degree of dispersion on the electrical conductivity of alloys representing a mechanical comparison of the crystals of the components; 3) On the electrical conductivity of coarsely dispersed alloys representing solid solutions; 4) Alloys representing solid solutions and electronic theory; 5) Electrical conductivity of coarsely dispersed metals at very low temperatures; 6) Electric ultramicroscope.
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Date submitted1912-06-05
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Date accepted1912-08-22
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Date published1912-12-01
Crystallization of diethyl ethylene disulfide
- Authors:
- D. N. Artem'ev
- I. F. Grigor'ev
Crystallization of this compound was carried out at a temperature of about +20 ° C from solutions in methyl alcohol, in which it dissolves quite easily even in the cold. When heated, solubility increases 57 crystals were revised. The results of the revision are shown in the table (see article).
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Date submitted1912-06-21
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Date accepted1912-08-23
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Date published1912-12-01
Crystals of 1 asparagine and their structure
- Authors:
- D. N. Artem'ev
For correct installation, 100 crystals were reviewed. The results of the revision and calculation of the probability of correct installation are given in the tables (see article). Using the example of asparagine, the legality of the decrease in the number of developed forms as the crystalline ball grows is extremely sharply and clearly demonstrated. In addition, during further crystallization, the appearance of any new forms that were not observed during the previous crystallization was never observed. From all the experiments described above, it clearly follows that the possibility of obtaining a much larger number of forms during the crystallization of a sphere, compared with what we observe during the free growth of crystals of the same compound.
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Date submitted1912-06-02
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Date accepted1912-08-19
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Date published1912-12-01
About the study of the Mountain Magnitnaya in 1911
- Authors:
- A. N. Zavaritskii
The study on the Mountain Magnitnaya, carried out by me last summer on behalf of the Board of the Joint Stock Company of the Beloretskii Iron Works, is the beginning of work, which practical goal is to determine the iron ore reserves of this deposit. In addition, these studies were supposed to clarify the features in the structure of the deposit, with which must be taken into account when drawing up a rational development plan. The work consisted of drawing up as detailed a geological map as possible; in determining, in accordance with the data obtained as geological research progresses, the location and type of exploration work necessary to determine reserves, and in the organization of these works.
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Date submitted1912-06-06
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Date accepted1912-08-26
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Date published1912-12-01
On the issue of determining the useful action of a compressor
- Authors:
- A. A. Lebedev
Until now, a generally accepted method for determining the useful action of compressors has not been established, and therefore comparison of these machines of different sizes and systems with each other according to their test data is very difficult, since each experimenter adheres to his own method of application. In the future, the author tries to establish rational grounds for determining the useful action of compressors, in which comparison of the results obtained in individual cases would not cause difficulties.
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Date submitted1912-06-25
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Date accepted1912-08-12
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Date published1912-12-01
Studies on electrical conductivity
- Authors:
- I. F. Shreder
The law of Matthiessen and Vogt makes it possible to bring together two classes of alloys. Both represent mixtures, the first - substances that correspond in their properties to the temperature of observation, the second - substances that seem to be heated to a higher temperature, and therefore have slightly different properties, but can be predicted, since this fictitious higher temperature determines the meaning and magnitude of the changes they could undergo. This can be confirmed to a certain extent by the effect of annealing on the electrical conductivity of alloys, for example, a perfectly studied pair of silver and copper. Before annealing, alloys have greater resistance—being first in a hardened state.
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Date submitted1912-06-14
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Date accepted1912-08-10
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Date published1912-12-01
Crystallization of 1-phenyl. 2-parachlorophenyl. 3-Fenchyl-imidoceanthide
- Authors:
- K. V. Tolstopyatov
Goniometric study. For measurements, the crystals were adjusted to the most developed belt, indicated on the attached diagram by the symbol [0121]. A total of 17 crystals were measured, of which six were taken to calculate the φ and β coordinates (see article). An optical study of 1-phenyl-2-parachlorophenyl-3-phenyl-imidoxantide crystals on a universal stage by E. S. Fedorov established the following arrangement of the axes of the optical ellipsoid: the NgNp plane coincides with the cleavage plane (1000), Np coincides with the direction of the crystal elongation, i.e. e. [0121].
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Date submitted1912-06-26
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Date accepted1912-08-15
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Date published1912-12-01
Main features of the new Geometry
- Authors:
- E. S. Fedorov
Taking into account the immeasurably greater simplicity of the method of new geometry as a method of mental construction (without the help of any auxiliary complex adjustments), one does not need to be a prophet to foresee that modern geometric analysis, in pursuit of its task, will supplant algebraic analysis, and the role of the latter will be reduced to such symbolic expressing the conclusions of geometric analysis (which is necessary to replace the essentially inaccurate implementation of geometric constructions in practical applications with precise calculations and calculations), which makes it possible to express the results in exact numbers.
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Date submitted1912-06-27
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Date accepted1912-08-14
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Date published1912-12-01
Axial collineation
- Authors:
- E. S. Fedorov
We can characterize collineation with an imaginary involution by two such self-collinear rays, of which one is infinitely distant in the horizontal plane, and the other is vertical. Although these two rays are truly self-collinear, and in no way are the axes of collineation with a real involution, but as two special ray, characterizing the symmetries of the system, we could conditionally call them the axes of imaginary collineation (conventional abbreviation of collineation with imaginary involution). We see that these systems have a center, three double axes of symmetry passing through it, and three planes of symmetry passing in pairs through the two axes of symmetry.
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Date submitted1912-06-28
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Date accepted1912-08-23
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Date published1912-12-01
Probable identity of two substances described as two different
- Authors:
- E. S. Fedorov
This includes, on the one hand, the substance obtained by Anschutz u. Beckerhoff as Benzoylderivat des Amyiphenols and Benzoylderivat aus Tertiaramylphenol, the crystals of which were described by Hartmann, and on the other hand, the substance Benzoyl, obtained by the same chemists, p. tertiara-mylbenol, the crystals of which were described by Schwanke.
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Date submitted1912-06-29
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Date accepted1912-08-15
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Date published1912-12-01
Is it always possible to bring two linear seconds into perspective (within one linear third)?
- Authors:
- E. S. Fedorov
The question posed is so elementary that, it would seem, its solution should lie in the most elementary textbooks. However, this did not happen, and in the most comprehensive manual available - Reye, Geometrie der Lage in Chapter 3 of Volume II, which specifically treats the perspective position of linear seconds, only the conditions under which two linear primes are considered (as usual, only two systems are considered - a system of points and a system of planes) are in a perspective position. Therefore, I think it useful to consider this issue in general terms.
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Date submitted1912-06-28
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Date accepted1912-08-04
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Date published1912-12-01
One of the ways to determine the optical sign of a crystal on a universal stage
- Authors:
- A. N. Zavaritskii
Two provisions are considered: 1. Property of crystals with an angle of optical axes 2V=90°C. 2. Determination of the optical sign of a biaxial crystal on a universal stage, when no optical axis is visible. It is possible to determine the position of the obtuse and acute bisector of the angle of the optical axes, and therefore the optical sign of the crystal.