Slide rule for connecting rod calculations (0920)
Info
Slide rule in wood to make calculations concerning the steam sliding valve.
In French: "Dianémomètre Marcel Deprez"
References/Links/More Info
Google books: Cours de machines: fasc. 1. Machines à vapeur, Dianometre, Page 126
Google Books "Revue universelle des mines et de la métallurgie", 1872, p. 18