Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 753
high being in the line a/, to determine the positionof the heel c on the ground, supposed to be level, an arc is to be described fromthe knee-pan ; the line ef is horizontal. It is clear that, in adopting these practical methods, all the limbs can bedeveloped geometrically without shortening. The…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-256-161.webp)
