structed by placing a series of tubes in erect positions, in a circular form, with the fire in the middle. A boiler of 'the kind proposed by the patentee, is shewn in section in Plate, II, at fig. 6. Within an enclosure of masonry or brick work, a series of hollow tubes, a, a, a, are erected, the upper ends of which open into a circular box, b, b, and their lower ends into a similar box, c, c. This lower box, c, is to be supplied with water from the reservoir, d, d, through the pipes, e, e, which water also rises in the tubes, a, a, and fire being placed upon the grate bars the water in the tubes will be made to boil.

The steam generated from the boiling of the water rises up the tubes, a, into the circular box, b, and passes off through the lateral pipe, g, to work a steam engine, or for whatever other purpose it may be required; and the water, which may happen to be thrown up out of the tubes by ebullition with the steam, runs down the descending pipes, h, h, into the reservoir, d, and from thence by the lower pipes, e, e, into the vessel, b, as before said. The fire is to be supplied with fuel at top, and with air for the draft at bottom, and the smoke passes off into a chimney above.

This is the construction of a boiler proposed, which appears to possess no other novelty than that of placing the tubes in a circle, with a reservoir surrounding them. The patentee says, "I claim the arrangement of the tubes a, whether such tubes are placed in circles concentric or excentric with each other, and also the reservoir, d, for supplying the tubes with water."

[Inrolled, May, 1825.]

added, flax, mohair, and down, with the carded silk in the same proportions. Or five pounds of beaver, and three or four of wool to one pound of down of feathers, two of flax, and three quarters of a pound of carded silk.

These materials are (as the first operation) to be equally divided into a hundred and forty two parts of each, ready for carding; the intention of which is, that about an ounce and a half of the materials combined may be passing through the carding engine at one time. The ordinary process of carding, and the constructing of the carding engine being well understood, as employed in the preparation of cotton, wool, and other materials, it is only necessary to say that the beaver is to be first laid upon the feeding cloth, and upon this the other materials, which being progressively drawn into the carding engine, the fibres become distributed and separated in the same way as in the usual process of carding other materials. From the carding engine the sliver is received into cans, aud then taken to the drawing frames and twisting machine, to be operated upon in the ordinary way, and afterwards spun in a mule into a thread of such fineness or number as may be required to produce the intended cloth.

If the fabric is to be rendered water proof, this is the part at which that process is to be introduced. The finest of the spun material having been wound upon a reel into hanks, is now to be soaked in a solution of shell lack, caoutchouc, or other resinous gums, dissolved in spirits of wine or other spirits; and after being squeezed, to express the moisture as much as possible, is to be dried in the air in suitable drying apartments, and is also now to be dyed of the required colour.

The threads prepared and spun from the materials

selected as above described, are now to be woven in a loom, having six, ten, or fourteen lambs and counter meshes, the fine waterproof threads being employed for the back or shoot, and the coarser threads spun from the same kind of material for the warp or face of the cloth. After being thus woven, that cloth which is intended to be rendered waterproof is to be ironed or passed under heated cylinders, for the purpose of making the gums flow into the fabric; and when stretched upon frames, the pile or nap of the cloth is to be raised by means of fine cards, teasles, or brushes, as is the usual practice in raising the pile of such cloths or other fabrics as are to exhibit a pile or nap on their faces.

The cloth is now fit to be employed for covering hats and bonnets, to represent beaver, which is done by attaching its back surface to the shells, frames, or cases that are to be made into hats or bonnets, the modes of doing which are well known in the hat-making trade.

If the above selection of materials be employed for the manufacture of velvet, or other kinds of fabric for wearing apparel, they are to be woven and otherwise finished in the same way as such articles are usually manufactured.

[Inrolled, April, 1825.]

TO WALTER FOREMAN, Esq. of Bath, in the County of Somerset, Commander in our Royal Navy, for his invention of certain improvements in the construction of Steam Engines.

[Sealed 1st October, 1824.]

THESE improvements apply to a rotatory steam engine

of the kind described in the specification of Moore's Patent (see Vol. III. page 169), in which a series of flaps are attached by hinge joints to a wheel within a circular box, and the force of steam being allowed to act against these flaps on one side, causes the wheel to be driven round.

The present invention consists in the particular form of the flap or valve, and of the chamber in which it acts. Plate II. fig. 7, is a representation of the interior of the circular chamber, shewing the rotatory wheel and the flaps or valves; fig. 8 is a cross section of the same, in which the form of the chamber and of the valves are represented. The operation of the engine is this: steam. being admitted from a boiler through the aperture, a, occupies the interior of the chamber, b, from the stationary block or stop, c, to the acting valve, d, and by exerting its expansive force within this chamber against these two surfaces, c, and d, causes the valve to be driven forward, and with it the wheel, k, k. When the valve, d, has reached the situation of e, the valve, i, will have fallen upon its hinge joint by gravity into the situation of d, and thus in succession the valves will be brought into action, and the wheel, k, be driven round by the elastic force of the steam.

From the hinder part of the block, c, an arm extends carrying the friction roller, l, and as the wheel revolves, the valves striking against this friction roller become closed, and the steam before the valve having performed its duty passes off at the exit pipe, m.

Thus far the construction and operation of this rotatory steam engine is not claimed by the patentee as new, but his improvement "consists in the conical form given to the side plates of the casing, n, n, in which the steam wheel moves and also to the flaps or valves acting therein