Mathematicall magick. Or, the wonders that may be performed by mechanicall geometry in two books, concerning mechanical powers [and] motions : being one of the most easie, pleasant, useful, (and yet most neglected) part of mathematicks ... (1680)
Wilkins, John, 1614-1672 · London : Printed for Edw. Gellibrand · leaf 321
398 … Where AB, reprefents a Screw volution of it, C D the afcending fide, E D the defcend ding fide, the point D the middle.- ‘The Horizon- the Helix j is filled with water, 77%. of the aicending fide, fromC the be- ginning x of the Hele to Dthe middle of it; and onthe de efcending fide, from D'the…
Mechanics
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.
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![An illustration from Mathematicall magick. Or, the wonders that may be performed by mechanicall geometry. In two books. Concerning mechanicall powers [and] motions. Being one of the most easie, pleasant, usefull, (and yet most neglected) part of mathematicks. Not before treated of in this language (1648)](https://img.insideoutlibrary.com/img/200/ia-b30323915-319-0.webp)
