Philosophical instructor, or, Webster's elements of natural philosophy : subdivided into principles and illustrations ; intended for academies, medical schools, and the popular class-room (1824)
Eaton, Amos, 1776-1842, Webster, John, fl. 1804-1824 · Albany : Printed by Websters and Skinners ... · leaf 50
not increase or diminishthe mechanic effect. The principal advantage which arises from a singlepulley, is in the mode by which the power is applied ;for in raising a loaded basket or bucket, by a linepassed over a pulley, the force acts downwards ;which is much less laborious than when it is… … Illustration. Whenone end of the tackle orcon I is fastened to ahook in the beam, andthe other passes throughthe groove of the movingsheave h, and from thisover another fixed at i,the power k will supportdouble its own weightsuspended at l ; for it isobvious that the cordsm and n each supportone…
Physics
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Examen dv livre des Recreations mathematiqves, & de ses problemes en geometrie mechanique, optique & catoptrique [du J. Leurechon] Où sont aussi discutées & restabiles plusieurs experiences physiques y proposées (1639)](https://img.insideoutlibrary.com/img/200/ia-examendvlivredes00mydo-376-71.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-48-16.webp)
