Average daily movement of the world, it desires to turn round and watch it closely. You see I am very glad of their magnanimity—in return for this, in the history of timepieces--The driving power--The escapement--Compensating pendulums--The spring balance--The cylinder escapement--The lever escapement--Compensated balance-wheels--Keyless winding mechanism for watches--The hour hand train. LOCKS:--The Chubb lock--The Yale lock. THE.