Beard, Adelia B. (Adelia Belle), 1857-1920 · Chicago, M. A. Donohue & company · leaf 54
f the oblong on the table top. Donald put all these parts together, slipping the projections A through the slits A, the projections B through the slits B, and the projections C through the slits C, and was delighted to find they fit perfectly. Then he made pegs like Figures 6 and 7 ; two like…
Paper work · Toys
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
![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-89-145.webp)
