sight-lessons. A skeleton cube, orlDarallelopii)edon, which can be quickly made ofwire, will be of much assistance in showing how theinvisible edges run. These skeleton forms willgreatly help tlie learner in making his first drawingsfrom the actual rectangular solids, as they willenable him to… … Cone, Cylinder, and Square Plinth Combined: Fig. 20. Directions for Fio. 20. —Draw the cone and cylinderfirst, and then the square plintli on wlncli the cylinder rests.Draw the straight lines in tlie order of the letters, and thenthe curves through the points indicated by the letters. This exercise…
Drawing
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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-55-82.webp)
