Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 92
rtical line untilit comes to rest. It will then return to the vertical, and thusoscillate from side to side. In order to investigate the phe-nomena of this kind of motion, the mathematicians study at firstan ideal pendulum, which they call a simple pendulum, to distin-guish it from the actual… … ■without mass or weight, perfectly flexible and inextensible.Such a pendulum is of course only a mathematical abstrac-tion ; but we can approach sufficiently near to it, for purposesof illustration, by suspending a small lead bullet to a fixed pointby means of a fine silk thread. Let O A, Fig. 28,…
Matter · Heat
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Common objects of the microscope [electronic resource] (1900)](https://img.insideoutlibrary.com/img/200/ia-49492157.2969.emory.edu-30-13.webp)
