Haswell's engineers' and mechanics' pocket-book .. (1844)
Haswell, Chas. H. (Charles Haynes), 1809-1907 · New York, Harper & brothers · leaf 62
ers. An Abscissa is a part of any diameter contained between its ver-tex and an ordinate. , w *u 4. ^; The Parameter of any diameter is a third proportional to that di-ameter and its conjugate. J. . • 14-^ The Focus is the point in the axis where the ordinate is equal tohalf the parameter. u i^ ^,.… … CONIC SECTIONS, 55 Draw an isosceles triangle, A B D, whose base shall be equal tothat of the proposed parabola, and its altitude, C B, twice that of it. Divide each side, A B, D B, into 8, or any number of equal parts;then draw lines 1 1, 2 2, 3 3, &c., and their intersection will definethe…
Engineering · Mechanical engineering
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