For an improvement in the use of Flat Boilers for Generating Steam. DANIEL FANSHAW and HORATIO HANKS, New York, June 11.

THE flat boilers which the patentees propose to improve, are thin quadrangular boilers placed on their edges, with the fire between them. There may, for example, be four such boilers, which have water pipes near their bottoms, connecting them with each other, and steam pipes uniting them together near their upper parts. The water, it is stated, has, heretofore, been forced into one of these boilers, and left to flow into the others through the water pipes. The middle boilers being the most exposed to the action of the fire, have highly elastic steam formed in them, which, by its force, frequently prevents the flow of the water into them, a circumstance pregnant with danger, and preventing the regular action of the engine. The improvement is the forcing of water into each of the boilers independently, which is said to obviate all the difficulty heretofore experienced.-Ibid.

For a new Pegging Machine, with plates, for making boots and shoes. NATHAN LEONARD, Merrimac, Hillsborough county, New Hampshire, June 11.

THIS machine consists of a press to be forced down by a lever. A metallic plate is prepared, in the form and of the size of the sole of the boot, or shoe, to be pegged. This plate is perforated with holes, corresponding with the pegs to be driven. Two other plates are prepared, one of which is furnished with awls, which are to pass through the holes in the first plate, and perforate the sole. The second plate is furnished with metal pins, with flat ends, which also fit into the holes in the first plate. When the boot is properly placed in the press, the perforated plate is laid upon the sole, and secured in its place; the plate with awls is then laid on, and pressed down; when this is removed, a peg is placed in each perforation of the plate, and that which has the pegging pins,. with flat ends, drives the whole of them home at one operation.-Ibid.

For a machine for Breaking and Cleaning Hemp and Flax. REUBEN MEDLEY, Bloomfield, Nelson county, Kentucky, June 11.

THIS machine is intended to operate by horse, or any other suitable power. It has a drum with three beaters, or breakers, formed of strips of wood, defended by plates of iron; after being operated upon by these beaters, the material passes from them between fluted rollers, which met each other just opposite the edge of the breast beam, upon which the beaters act. Upon the same shaft which carries the drum, and about two feet from it, there are lifters which raise a brake, with slats upon its under side, which work between fixed slats below, like the common Dutch brake. Beyond the lifters, knives, about 18 inches long, extend out from the shaft; these knives have

dull edges, which work against a spring board, upon which the flax, or hemp, is to be cleaned. The claim is to "the whole of that part of the machine which operates in the breaking of the hemp, or flax."-Ibid.

For an improvement in Stoves. WILLIAM NAYLOR, New York, June 11.

THIS stove is formed in front like a parlour grate, for an open fire, and is to be used with any kind of coal, or with wood; anthracite coal being preferred. Behind the fire there is an oven, boilers, and other appendages, arranged after the manner of a ship's caboose. The whole seems to us to be compact and well arranged; its parts, however, are too numerous for verbal description.

Several very excellent cooking stoves have been invented in New York, and this, we think, will add one to the list.—Ibid.

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For an improvement in the Plough, by which the sides of hills can be ploughed backwards and forwards, throwing the ground always on the same side of the furrow. PHILIP ALTENDERFER and BENJAMIN ALTENDERFER, Richmond, Berks county, Pennsylvania, June 11. THE specification tells us that "there is a beam with a double mould-board, pointing both ways, but both facing on the same side; two shares, and two coulters, also pointing in opposite directions, space between the shares being closed, and also the mould-boards closed on the land side. To the above mentioned beam there is another beam [attached] which runs, or rather revolves, upon a pivot in the centre of the first mentioned beam. To the latter beam the handles are attached, and when it is desired to turn the horses, it can be done at pleasure. The upper beam is secured upon the lower by a screw upon the pivot, and by an iron pin at the end to which the handles are attached, which may be drawn out at pleasure whenever it may be desirous to change the direction."Ibid.

For an improvement in the form of Boxes for the Wheels of Post Coaches, Carts, Waggons, and other Carriages; called the " Cylindro-conical, Self-wedging, or Self-fastening Box." THOMAS MUSSEY, New London, Connecticut, June 11.

THIS is one of those simple and obvious improvements, which when once presented to us, excites our surprise that it should uot have been made long ago. The improvement is upon the form of the exterior of the cast-iron boxes in common use. These have, heretofore, been cast tapering on the outside, as well as within, but in the reversed direction, and they have been so made, because, in this form, the pattern, in casting, would readily deliver from the mould. When thus cast, the smaller, or front box, has its exterior diameter smallest at the end towards the centre of the hub, or nave; the conséquence of which, is, that the least start, after it has been driven into its place, loosens it in every part, and it readily comes out. The larger

box, on the contrary, has its larger diameter towards the centre of the nave, and cannot, therefore, be driven into its place, but must, necessarily, be secured by wedges, which are very apt to work out. The patent boxes are made perfectly cylindrical on their outsides, with the exception of a small distance from the end which is first to enter, where they are sufficiently tapered, or chamfered, to prevent their cutting the wood before them. The ears, or projections, which are to prevent the boxes from turning, are made sharp on their inner ends, and, when driven, force their own passage way.-Ibid.

For an improvement in the Cast-iron Plough. JACOB MINTURN, Urbanna, Champaign county, Ohio, June 11.

THIS plough looks so much like many others, that it would puzzle an adept in the science of Lavater to discover, from its countenance, any difference in its disposition from many members of the same family. The patentee tells us that the improvement here claimed, as aforesaid, differing from other ploughs now in use, particularly when the share joins the mould;. the mould rests on the share more than twice as high on the left as what it does on the right hand side, so as to form the whole into a regular curve for turning the soil. Also, the book projecting from the mould, and supporting the hinder part of the share; the mould also differs from others now in use, but which difference I do not claim."-Ibid.

For a machine for Shelling and Cleaning Indian Corn. JOHN S. GARDNER, Canandaigua, Ontario county, New York, June 11.

THE corn is to be shelled by passing between a wooden cylinder, with projecting spikes, and a concave segment of a curve, formed of wood, and furnished also with spikes. There are springs to adapt them to each other for the varying sizes of the ears of corn. The corn is to be put into a hopper, and carried to the cylinder by a feeding apron; it afterwards falls upon a screen, which separates the grain from the cob, and a fan completes the cleaning.

There is no particular claim. and although the machine appears to be a good one, we apprehend that it is not novel in all its parts. The first machine for shelling corn, invented upwards of twenty years ago, had a cylinder perfectly similar to the one here described, although it was, upon the whole, a much less perfect instrument. Ibid.

For an improvement in Water and Paddle Wheels. BENJAMIN HOWARD, Worcester, Massachusetts, June 11.

THIS is similar to the wheel for which a patent was obtained by Adolph Heilbronn, of New York, which is described in our last number, with engravings. The difference between them is in the details merely.

The coincidence in the particular construction of the wheels is a remarkable one. The priority in the time of application, and in the date of the patent, belongs to Mr. Heilbronn; the originality of invention is a question for others to determine.

For an improved Plough, called the Diamond Plough." JOHN RHODES, Urbanna, Champaign county, Ohio, June 11.

THAT others may discover where the merit of the invention lies, we give the whole specification, as it is short. All the peculiarity that we perceive in it, is, that the mould board is made partly of iron, and partly of wood; it being widened out at top, by means of the latter material.

"John Rhodes' newly invented plough, differs from other ploughs now in use, as follows: The land-side and share are of wrought iron, and laid with steel; the wing welded to the bar in front, and raised so as to form the principal part of the mould, extending back to the right handle, and fastened to said handle with a bolt and screw; also a piece of wood extending from the sheath to the handle, and fastened either with a screw or rivet, and placed on the top so as to form the balance of the mould; also a bolt with a screw passing through the mould and sheath, connecting them together; the bolt connecting the beam and share together locking in the socket, the coulter being locked on the point of the share, and fastened to the beam on the land-side with a clamp and two screws. This plough may be used with or without a coulter."

For an improvement in the Construction of Fire Arms, viz: Rifles, Muskets, Fowling Pieces, Ordnance, &c. JAMES MILLER, Brighton, Monroe county, N. Y. June 11.

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Tuis gun is very similar to that of Rogers, and to Wheeler's (see page 213 in our last number.) A revolving chamber, containing seven charges, is placed behind the main barrel. Each of the perforations in this revolving piece has its touch-hole, and its percussion priming.

"The improvement relied on in this machine, consists in the simplicity of its construction, every way adapted to hunting, and for war purposes."—Ibid.

For an improvement in Bellows Tubs, or Cylinders, for Furnaces, or Forges. ANDREW A. M'PHARRIN, Huntingdon, Pennsylvania, June 11.

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THE specification of this patent gives but a confused description of the invention but the drawing is pretty well executed, and from this it appears that the part called the tub is a single cylinder, having a thick diaphragm in the middle, perforated in the centre, to allow a piston rod to pass through it, and having a double valve, closing a square hole, communicating with each division of the cylinder;

between these valves, in the thickness of the diaphragm, a nozzle, or wind pipe, passes out through the side of the cylinder. The piston rod is worked by a crank, connected with a pitman, below the cylinder; upon the rod which passes through the diaphragm, there are two pistons, one above, and the other below it, each piston having a valve opening inwards. It is evident, therefore, that the action of the cylinder, with its double chamber, is analogous to that of the ordinary double bellows, but that it must have the defect of an entire, though momentary, stoppage of the blast at every return stroke. To obviate this, there is upon the wind pipe, a cylindrical chamber, with a weighted piston, to serve as a reservoir for the wind; the loaded piston acting like the upper board of the double bellows. In the wind pipe, there is a damper, which may be closed, or opened, to regulate the exit of the wind.

We do not perceive the superiority of this arrangement, to that of other cylindrical bellows, and are very apprehensive that this patent, like many others, has been obtained by one who is not acquainted with what has been elsewhere done in his own business. The common plan of three separate cylinders, which keep up a continued blast, seems to us to be altogether superior to the mode here proposed.

For a machine for Sweeping or Cleaning Chimneys. SAMUEL DOW, Elizabethtown, New Jersey, June 11.

THERE is an elastic rod, made in joints, so that they may be attached to each other as they are passed up a chimney; upon the upper of these there is a block, to which the handles of four or more brushes may be fastened, so as to branch off in different directions; these handles are also elastic; the brush part is to be formed of bristles, whalebone, or any other suitable material. Just below the brushes there are attached pieces of iron, which are to operate` as

scrapers.

The claim is to "the machine or broom, in all its parts, as applied to the sweeping and cleaning of chimneys."

From the days of Jonas Hanway to the present, attempts have been made, particularly in England, to construct a machine to obviate the necessity of "climbing boys," and we have no doubt that upwards of fifty machines for this purpose have been offered to the public; there has been a general feeling in their favour upon principles of humanity. The one now proposed strongly resembles some of the earlier attempts in this way; these, however, and many others, with an aspect of greater promise, have been abandoned, in consequence of the impossibility of adapting them to the endless variety in the form, direction, and size of chimneys.-Ibid.

For an Improvement in Bedsteads.
PEARSON, Essex County,

EBENEZER ROGERS and MICHAEL
Massachusetts, June 11.

THIS improvement is similar to Mr. Copcutt's, (p. 241,) excepting that the right and left-handed screws are, as in days of yore, of