Lessons in horology - Grossmann, Jules, 1829-1907; Grossmann, Hermann, 1863-; Allan, James, 1865- (Philadelphia : The Keystone, 1905)
volume 1. The principles of cosmography and mechanics relating to the measurement of time--motive force, mainsprings, trains, gearings, et cetera.
The leading text on horological theory in Switzerland around 1900, translated into english (Unsure if Vol. 2 was ever translated), Title Page missing
Keywords: Clocks and watches; Clocks and watches; Theory General; Switzerland; Theoretical advanced; Timekeeper (general)