The zero system as a polar system in a linear prima of conosunds

Abstract

The plane passing through the polar line a and the point, has as its zero point the one at which the polar intersects with the zero plane of the point A. The straight line connecting this point B with point A, like a polar, has a point on the polar a as its pole, and these two points form a conjugate pair on this polar. Each plane, simultaneously tangent to two conosecunds of such a prima, has as its polar a straight line connecting the two points of tangency. If the plane is simultaneously tangent to more than two conosecunds, then it is tangent to all conosecunds of the linear prima, which in this case have one common point of tangency with it and with each other. The zero system is polar with respect to linear primas of conosecunds, just as an ordinary polar system follows from a single conosecund.

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