Front cover image for Lessons in horology

Lessons in horology

Jules Grossmann, Hermann Grossmann (Author), James Allan (Translator)
Print Book, English, 1905-
The Keystone, Philadelphia, 1905-
volumes : frontispiece, diagrams, 22 cm
v. 1. The principles of cosmography and mechanics relating to the measurement of time
motive force, mainsprings, trains, gearings, etc