TY - BOOK AU - Grossmann,Jules AU - Grossmann,Hermann AU - Allan,James TI - Lessons in horology PY - 1905///- CY - Philadelphia PB - The Keystone KW - Clocks and watches KW - fast KW - Theory General KW - Switzerland KW - Theoretical advanced KW - Timekeeper (general) N1 - volume 1. The principles of cosmography and mechanics relating to the measurement of time--motive force, mainsprings, trains, gearings, et cetera ER -