CHAP. XIII.

STEAM NAVIGATION.

[Pg441]
TOC  INX

FORM AND ARRANGEMENT OF MARINE ENGINES.—EFFECTS OF SEA WATER IN BOILERS.—REMEDIES FOR THEM.—BLOWING OUT.—INDICATORS OF SALTNESS.—SEAWARD'S INDICATOR.—HIS METHOD OF BLOWING OUT.—FIELD'S BRINE PUMPS.—TUBULAR CONDENSERS APPLIED BY MR. WATT.—HALL'S CONDENSERS.—COPPER BOILERS.—PROCESS OF STOKING.—MARINE BOILERS.—MEANS OF ECONOMISING FUEL.—COATING MARINE BOILERS WITH FELT.—NUMBER AND ARRANGEMENT OF FURNACES AND FLUES.—HOWARD'S ENGINE.—APPLICATION OF THE EXPANSIVE PRINCIPLE IN MARINE ENGINES.—RECENT IMPROVEMENTS OF MESSRS. MAUDSLAY AND FIELD.—HUMPHRYS' ENGINE.—COMMON PADDLE-WHEEL.—FEATHERING PADDLES.—MORGAN'S WHEELS.—THE SPLIT PADDLE.—PROPORTION OF POWER TO TONNAGE.—IMPROVED EFFICIENCY OF MARINE ENGINES.—IRON STEAM-VESSELS.—STEAM-NAVIGATION TO INDIA.