ding with the minoraxis of the ellipse. The fact above alluded to will be obviousfrom conside;ring the figure of a cube with acircle insci-ibed in each of its planes, and con-sidering the circles as wheels on an axle. Thetwo other lines, (or spokes of the wheel) inthe ellipse, which are di-awn… … and therefore the^ lines are parallel to the othersides. They likewise give thetrue diameterof the wheels, reduced to the scale required. The ellipse itself may be drawn by anelliptic compass, as that instrument may beproperly set, if the major and minor axes areknown. If it be intended to…
Design · Decoration and ornament · Art
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Il terzo [-qvinto] libro ... (1551)](https://img.insideoutlibrary.com/img/200/ia-ilterzoqvintolib00serl-81-96.webp)
![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-115-306.webp)
