Isochronism of balance-springs /
Frodsham, Charles,
Isochronism of balance-springs / Charles Frodsham. - 31 pages : illustrations ; 21 cm - Waltham Watch papers ; v.1 . - Waltham Watch papers ; v.1. .
Reprint of: Waltham, Mass., 1862.
Clocks and watches.
Springs (Mechanism)
OscillationScience Not Geographic isichronism watch balancewheel advanced Fordsham Charles Pocket Watch
Isochronism of balance-springs / Charles Frodsham. - 31 pages : illustrations ; 21 cm - Waltham Watch papers ; v.1 . - Waltham Watch papers ; v.1. .
Reprint of: Waltham, Mass., 1862.
Clocks and watches.
Springs (Mechanism)
OscillationScience Not Geographic isichronism watch balancewheel advanced Fordsham Charles Pocket Watch