d, 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, whichis simple and effective, opened out like an umbrella, the sparks coruscating like in the Electrician: has been patented by Messrs.… … 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…
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from One thousand processes in manufactures and experiments in chemistry / [Colin Mackenzie]. (1825)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b29307867-167-1.webp)
