Kingdom.]

AND BUILDING CONTRIVANCES.North Gallery, and with Classes 5 & 6.

311

E, needle point, either of which may be turned to theend by pivot F. G, H, pen and pencil, worked same asD, E. The entire forms but one instrument.

A model of Thenard’s moveable flood-gates or lifts,called “hauses,” for rendering rivers navigable, and sup-plying the place of fixed stone weirs, which exhibits amode of fixing the lifts, or hauses, at the bottom of theriver, so as to prevent stonework impeding the current.They are cheaper than weirs; prevent the flooding ofadjacent lands; and are useful in fisheries, mill-power,arterial drainage, and navigation. They are in operationin the river L’lsle, in France .

14 Jeffery, Robert, Upper North Place, Gray’s Inn

Road— Inventor.

Railway tunnel signal, intended to prevent accident toa train while in a tunnel, from being overtaken by anothertrain. At present, if from slackness of speed, temporarystoppage, or any impediment, a train is detained in atunnel, great alarm is felt by the passengers, lest thefollowing train should overtake it. This invention ex-hibits a large white disc by day, and a lamp by night,either of which is self-acting; and it is displayed con-spicuously at the upper edge of the arch, immediately onthe train entering, remaining in sight until the train leavesthe other end of the tunnel, when it instantly disappears.This is repeated whenever a train enters and quits thetunnel, without any assistance. The following train isalways reminded by the presence or absence of the discor lamp, whether the tunnel is clear or not. It also in-dicates to the authorities, by any unusual length of timeduring which the disc is in sight, the existence of someinterruption in the tunnel.

15 Hammond, Richard Charles, 45 Baldwin’s Gardens,Leather Lane, Holborn —Inventor and Manufacturer.

Model of a convex-chain suspension bridge.

1 6 Pratt, Major, 7 Upper Area, Hungerford Market

—Inventor.

Moveable flight of steps, for tidal rivers. The stepsare entirely independent of each other.

New self-acting trap for street drains; it can be easilyfixed or moved, without displacing the brick-work onwhich the grating rests.

17 Green, Joseph, Caledonian Road— Inventor.

Model of moveable dam for river operations; and of a

new plan of shifting a dam for constructing sea-walls fordocks, piers, harbours, &c.

18 Clark, Charles, C.E., Seaside Hotel, Hastings —

Inventor.

Model of a proposed grand ship canal through theisthmus of Suez, to save 5,000 miles of sea passage, orfialf the distance.to India .

19 James, Jabez, 28a Broad Wall, Lambeth—

Manufacturer and Designer.

Model bronzed fountain, with steam-engine for supply->ng it. ( Main Avenue West.)

20 Watt, W., Glasgow —Manufacturer.Hydro-pneumatic lift, for canal locks.Hydro-pneumatic elevators.

Patent hydro-pneumatic sliip-lift.

Application of compressed air for the prevention ofvessels from sinking.

21 West&Gregson, Union Street, Oldham— Designersand Manufacturers.

Model station-meter for gas-works.

Experimental meter, for ascertaining the consumption°f gas per hour, of any description of burner, in cast-ironcase.

Consumers’gas-meter: patent enamelled inside, wherebythe iron is preserved from oxidation.

24 Morton, Samuel & Hugh, Leith Walk, Edinburgh —Inventors and Manufacturers.

Model of a patent slip, for hauling up ships, of thelargest class, for repairs—a cheap substitute for dry docks—with model of a frigate.

[Slips for hauling up ships for repair were very earlyused at the Mediterranean ports; but the mechanismwhich removed the excessive labour of the operation wasinvented and patented by Mr. Morton in 1818. Beforethis system was adopted, the cost of hauling up a ship of500 tons was 170Z.; it is now reduced to 3/. A slip maybe constructed for one-eighth part of the expense of adry dock. Upon a well-constructed slip, a steam-engineexerting 1-horse power for every 100 tons will draw aship at the rate of 2J feet per minute.—S. C.]

25 Martin, John, Lindsey House, Chelsea —

Designer and Inventor.

Self-acting valves for sewer and house-traps.

Plan and model of railway, invented 1834. This prin-ciple of rail has been adopted on the Great Western line.

Section of rail and laminated beam. This beam isemployed on the South Western and South EasternRailways, and in other structures.

Sections of fire-proof and laminated beams, and theirapplication to strong, light, and durable roofs.

Elevation of proposed bridge at Westminster.

Elevation and sections of centre arch of bridge, showingthe laminated beams, stays, and cast-iron planting; thegeneral principle of construction being applicable to allbridges across rivers with low banks.

Model of framework cube used in the construction ofships, floating batteries, harbours, and piers.

Plans and sections showing the application of frame-work cube and laminated fire-proof beams to ships, har-bours, &c.

Lighthouse for the sands, and sand indicator, invented1829. Lighthouses on this principle have been erectedon the Maplin Sand, and elsewhere.

Cleaving anchors, with piles and cables of wood lami-nated with iron.

Drawing and model of life-boat.

Mode of working and ventilating coal-mines.

Drawing and model of pipes and couplings, which canbe quickly connected together, or disunited.

Drawings and models of filter drain pipe and mode oflaying. __

26 Forster, James, 5 South John Street, Liverpool —

Inventor and Patentee.

A fountain, and four household filters; the whole ofthe water being filtered by the apparatus in its passagethrough the service pipe. The sole manufacturers areCochrane and Co., Woodside Iron Works, Dudley.

(Central Avenue.)

27 Renezynski, Captain George Alexander,

31 Tonbridge Place, New Road —Inventor.

Self-sustaining suspension bridge, which may be builtof wrought-iron or wood; free from side oscillations, andhaving little deflection.

Steam-power engine for railways or turnpike roads,with six wheels, and self-feeding boiler, requiring notender; with locomotives, &c.

A hand-power-speed machine for railways and turnpikeroads.

An improved quadrant stand.

28 Stuart, William, M. I. C. E„ Plymouth Devon—Designer and Superintendent of the PlymouthBreakwater Works.

Model, in limestone, of the breakwater in PlymouthSound, on a scale of 1 inch to 42 feet, with silver light-house and beacon, made for the Exhibition, under thedirection of the Lords of the Admiralty. The breakwater