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 38
36 PENDULUMS, Whatever number of balls may be let fall on oneside, the same number will have an equal motion onthe other, and the intermediate balls will remain motionless.
Physics
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