Grossmann, Jules,  1829-1907, <br/><br/>
Lessons in horology / 
by Jules Grossmann ... and Hermann Grossmann. Authoritzed translation by James Allan, Jr. ... volume1- 
 - volumes :  frontispiece, diagrams,  22 cm 
<br/><br/>volume 1. The principles of cosmography and mechanics relating to the measurement of time--motive force, mainsprings, trains, gearings, et cetera. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clocks and watches.<br/>Clocks and watches.
<br/><br/><label>Subjects--Index Terms: </label>Theory General Switzerland Theoretical advanced Timekeeper (general)