_alias_ WEISSFELD. ] [Illustration: 4. WILLIAM AUSCH. ] (_For an account of divers working below water with pneumatic tools.] AIR-PUMPS. [Illustration: FIG. 111.] [Illustration: FIG. 209.--The winding mechanism for watches--The hour hand train. LOCKS:--The Chubb lock--The Yale lock. THE CYCLE:--The gearing of.