In general any two curves traced on the same cone may be considered as projections one of the other. ... above analysis it will be easily understood how Pliickera#39;s equations, a#39; connecting the ordinary singularities of plane 1 curves, may be ... of projection, any conic may be project into a circle, and at the same time any line in the plane of that conic into the line at infinity. ... In descriptive geometry , for example, orthographic projections of objects upon a vertical and a horizontal planeanbsp;...

Title | : | A Dictionary of Science, Literature, & Art |

Author | : | William Thomas Brande, George William Cox |

Publisher | : | - 1872 |

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