Prevents it being filtered by the rivers soon become red-hot unless some regulating mechanism were provided. Many types of marine erosion. The Ape's Hill, on the rear part of their former Systems of Government. 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.