nd, has devised Mo. in height, solid and smooth, and then the top, expanding, a modified form of Daniell cell, which he thus describes An improved well casing, which is simple and effective, opened out like an umbrella, the sparks coruscating like has been patented by Messrs. Henry Shear and Henry… … it and catching into the transverse groove of the bolt track. The revolution of the upper pair, by friction, is ex- tongue. " While using the same materials, and the same strength pected to drive the lower pair, the tires of the latter serving Mr. Patrick H. Duke, of Richmond, Va., has patented a…
Patented · Patents · Caoutchouc · Caisson · Scientific American · Conch · Wrought iron · Wood working · Trade catalogs · Oil tanks · Machine shop · Air chamber · Patent issued · Rock drill · Twenty years
Internet Archive · Public domain (published before 1931). Free to use for anything.
