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 53
om the cylinderb passing over d,and from a overe, each having a weight of twopounds fastened at f and g ; then the cylinders s\ illbe drawn together, and form a resistance to the sidesof the wedge a k and k b. Now, supposiug the re-sistance of the cylinders to act with a force of twopounds each,… … Remark. But the force that is given to a wedge isgenerally applied by a stroke, and not by the deadpressure of a weight; and a smart blow with a ham-mer of four ounces will overcome more resistancethan a weight of two pounds laid on the top of thewedge. A blow from a hammer of fourteen…
Physics
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![An illustration from Cosmographia Francisci Mavrolyci Messanensis Sicvli : in tres dialogos distincta, in quibus de forma, situ numerʹoq[ue] tam coelorum q[uam] elementorum, alijsq[ue] rebus ad astronomica rudimenta spectantibus satis disseritur (1543)](https://img.insideoutlibrary.com/img/200/ia-cosmographiafran00maur-157-0.webp)
