Kingdom.] RAIL WAT AND MARINE MECHANISM. 213

North Areas A. B. 10 to 34; C. D. E. 1 to 10, & 19 to 33; E. 1 to 32 ; G-. H. 1 to 13, & 19 to 26.

16 Davies, Jonah & George, Albion Foundry , Tipton,Staffordshire —Inventors.

Pair of patent elliptic revolving steam-engines.

1 Self-acting steam-regulating damper, for high and lowpressure steam.

Feed nozzle for boilers.

Patent sluice valve, for air, steam, or water.Equilibrium valve.

Double beat for nozzles.

Patent revolving blowing apparatus.

20 Joyce, William, Greenwich —Manufacturer.

Steam-engine, high pressure, four-horse power, calledthe pendulous steam-engine.

The principal advantages of this engine are:—1st. Itsgreat economy of fuel, the average consumption being31bs. of coals per horse power per hour; 2nd. Its greatsimplicity ; 3rd. It effects a saving of about one-half thespace usually occupied by engines of similar power.Fig. 1 represents a side, and Fig. 2 a front, elevation ofthis steam-engine.

Joyce’s Pendulous Iligli-pressure Engine.

22 McNaught, William, 26 Robertson Street , Glasgow—Inventor.

Patent double-cylinder steam-engine; a modification

of “ Woolfs double-cylinder engine,” in which steam isadmitted at a high-pressure into a small cylinder, fromwhich it passes into a larger one, where it expands, and

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McNaught’s Patent Double Cylinder Steam-engine.