The Artisan, or, Mechanic's instructor : containing a popular, comprehensive and systematic view of the following sciences ... also biographical notices of eminent scientific men, enriched by portraits : with many interesting and valuable articles relating to the mechanical and useful arts : the whole intended as a companion to the institutes (1825)
Carey, George G · London : Printed for William Cole · leaf 501
D. Problem. — To bisect a given arch ; that is, Because A C is equal to CB, and CD to divide it into two equal parts. common to the triangles ACD,BCD, the Let A D B be the given arch ; it is re- two sides AC, CD are equal to the two quired to bisect it. B C, C D ; and the angle AC D is equal to… … mecbanxcs. supported by two oblique forces, their on Wheel carriages. horizontal thrusts must be equal, other- The effect of the suspension of a car- wise the body would move more laterally ; riage on springs, is to equalize its motion, and in order that the horizontal portions by causing every…