Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 28
Fig. 22. … Fig. 23. 57.—The axis of a cone is a right line passmg through it, fromthe vertex to the centre of the circle at the base. 58.—An ellipsis is described if a cone be cut by a plane, notparallel to its base, passing quite through the curved surface,(a 6, Fig. 23.) 59.—A parabola is described if a…
Carpentry · Architecture
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-86-130.webp)
