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 56
with a number of small wheels,which are called friction rollers. These are held to-gether in a box by its inflexed ends, and fastened inthe nave, so that the axle of the carriage may restupon them ; aud they turn round their own centres,following each other around in the box as the wheelcontinues… … 54 TRICTION OK ATTRITION. Cylindrical and spherical rollers are used withgreat advantage in turning heavy bodies, such as thetop of a windmill, or the dome of an observatory ; orin moving large logs of wood or blocks of stone fromone place to another. The grand equestrian statueof Peter the Great,…
Physics
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from A treatise describing and explaining the construction and use of new celestial and terrestial globes; designed to illustrate ... the phoenomena [sic] of the earth and heavens, and to shew the correspondence of the two spheres. With a great variety of astronomical and geographical problems occasionally interspersed (1766)](https://img.insideoutlibrary.com/img/200/ia-treatisedescribi00adam-166-10.webp)
