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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15338</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15338</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Статьи</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Articles</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Determination of the magnitude of birefringence</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Определение величины двупреломления</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Nikitin</surname>
            <given-names>V. V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Никитин</surname>
              <given-names>В. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Nikitin</surname>
              <given-names>V. V.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1908-12-25">
        <day>25</day>
        <month>12</month>
        <year>1908</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1908</year>
      </pub-date>
      <volume>1</volume>
      <issue>5</issue>
      <fpage>373</fpage>
      <lpage>391</lpage>
      <history>
        <date date-type="received" iso-8601-date="1908-07-02">
          <day>02</day>
          <month>07</month>
          <year>1908</year>
        </date>
        <date date-type="accepted" iso-8601-date="1908-09-20">
          <day>20</day>
          <month>09</month>
          <year>1908</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1908-12-25">
          <day>25</day>
          <month>12</month>
          <year>1908</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1908 В. В. Никитин</copyright-statement>
        <copyright-statement xml:lang="en">© 1908 V. V. Nikitin</copyright-statement>
        <copyright-year>1908</copyright-year>
        <copyright-holder xml:lang="ru">В. В. Никитин</copyright-holder>
        <copyright-holder xml:lang="en">V. V. Nikitin</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/15338">https://pmi.spmi.ru/pmi/article/view/15338</self-uri>
      <abstract xml:lang="ru">
        <p>В работе рассматриваются следующие вопросы: 1. Определение величины двупрепломления по отсчетам при прямо и обратно параллельном положении компенсатора и исследуемого зерна. 2. Степень чувствительности вращающегося компенсатора, компаратора Siedentopf и кварцевого и слюдяного компенсаторов Федорова.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The following issues are considered in the work: 1. Determination of the magnitude of birefringence from readings taken with the compensator and the investigated grain in direct and reversed parallel positions. 2. The degree of sensitivity of the rotating compensator, the Siedentopf compensator and the Fedorov quartz and mica compensators.</p>
      </abstract>
    </article-meta>
  </front>
  <body/>
  <back>
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</article>
