Claim. "I claim 1st the curved (or angled downward for the purpose described) bearer, for supporting the blade in the manner described.

"I claim the arrangement and construction of the fingers or teeth for supporting the grain so as to form the angular spaces in front of the blade, as, and for the purpose described.

"I claim setting the lower end of the reel post behind the blade, curving it and leaning it forward at the top, thereby favoring the cutting and enabling me to brace it at the top, by the front brace, as described, which I claim in combination with the post."

24. For a composition of matter for Lubricating the Rubbing Surfaces of Machinery; Increase S. Hill, and Joseph Dixon, the former of Boston, and the latter of Taunton, Massachusetts, January 31.

The patentees say, "Our composition consists mostly of zinc, (which as is well known belongs to the class of cheaper metals) hardened by being compounded with what we denominate a hardening compo

sition.

"This latter composition is formed of the following metal, mixed in a state of fusion in the proportions hereinafter specified, viz. fifteen parts of tin to thirty-five parts of copper.

"This composition in a state of fusion is to be mixed with molten zinc and tin, (although tin is not absolutely essential) in the proportion of the two parts of the said hardening composition, of nineteen parts of zinc, and from three to five parts of tin, according to the peculiar purpose for which the composition is to be used, the tin specified to be added last, having the tendency to render the compound when cold more or less ductile, according to the quantity of the same incorporated therewith. The metal forined without the addition of the last named proportion of tin, when broken, will have the appearance of cast steel of coarse quality, but the addition of tin will make it stronger and cause it to be finer in grain until four parts of the same will be added, when the appearance of the metal on its being broken, will be like that of fine cast steel and more closely resemble the same than any other metal.

"The great strength of the composition combined with a certain degree of softness which it possesses, renders it highly useful in the construction of bearings for rubbing surfaces of machinery, as it is capable of resisting for a great length of time, the effects of wear and attrition. The large proportion of zinc used in forming the compound renders its use in the mechanical arts, much less expensive than the metal ordinarily employed for these purposes, the cost being much less than any other composition in which copper and tin are the priucipal metals.

"What we claim as our discovery, and desire to have secured to us by letters patent, is the composition or compound metal formed by the admixture of the above specified proportions of zinc, and hard. ening composition described, whether tin be superadded in the proportions described or not."

25. For an improvement in the machine for Drilling, &c., Iron, &c.; Aretus A. Wilder, Detroit, Michigan, January 31.

The mandrel has a rotary as well as an end wise movement, the latter being communicated by a screw on the mandrel which passes through a nut on a cog wheel. The mandrel also slides through another cog wheel which gives to it the rotary motion by a feather, and (this cog wheel takes into another cog wheel on one end of a shaft, parallel with the mandrel and having another cog wheel on the other end taking into the cog wheel on the nut, so that by giving different diameters to these wheels the mandrel with its drill will be moved forward with any desired degree of velocity; but for the purpose of running back the mandrel very fast, the nut has notches in its periphery, into which a dog falls to prevent it from revolving, and at the same time another dog catches on the frame and retains it in place, this is effected by the movement of a lever which at the same time gives an end wise movement to the shaft of the wheel that communicates motion to the nut for the purpose of throwing this out of gear.

Claim." What I claim as my invention, and desire to secure by letters patent, is the combination of the lever and cogs with the nut and shaft, for stopping the nut and throwing the wheel out of gear, as herein set forth."

26. For improvements in the Plough; Bancroft Woodcock, Wheeling, Ohio county, Virginia, January 31.

The reversable joint and share of this plough are secured by a wedge for each. The back end of the point passes between the under side of the mould-board and a staple, which extends from the landside to the mould-board, and then a wedge is driven in between this staple and the under side of the point, and the reversable share has a mortise which passes over a tenon projecting from the under side of the mould-board, and so notched as to receive a key.

Claim. What I claim therein as new, is the manner in which I have given stability to the respective parts of my plough, by securing the same together by the means herein set forth: that is to say, by the combined action of the staple and wedges of the projections on the point of the hooked knob, and its wedge, arranged and connected with the other parts as set forth, by which arrangement and connexion of the respective parts, I have those parts which are to bear the main strain and shocks in a form which insures the necessary strength, and prevents them from moving out of their places.

"I do not pretend to claim the use of hooks, mortises, or wedges, but limit my claim as above set forth, to the particular manner in which I have arranged these in my improved plough.

27. For an improvement in Ships' Augers; Wm. N. Clark, Chester, Middlesex county, Connecticut, January 31.

The upper edge of the single twist auger is made concave, instead

of convex, as heretofore, to give a cutting edge along the entire length of the twist, to assist in clearing the auger.

Claim." What I claim as my improvement, and desire to secure by letters patent, is the mode of making the single twist ship auger, the bit and gimlet, with the upper inner surface of the twist concave, as above described, and for the object set forth."

28. For an improvement in the apparatus for Felting Cloth; John Andrews, Bellville, Bergen county, New Jersey, January 31.

This improvement is for subjecting the felt to the action of moist and dry heat at the same time. The bed or box on which the bat is felted by the platen or rubber, is hollow and provided with pipes to admit steam to heat it, and this communicates with another steam box, the top of which is pierced with small holes for the escape of steam to that portion of the bat which rests on it before it passes to the rubber to be felted.

Claim. "What I claim and desire to secure by letters patent, is the manner herein described of combining and arranging the steam box with its perforated top, the second steam box in the rear thereof, and the reciprocating platen and rubber by which it is surmounted, so as to co-operate in the process of felting, in the manner set forth.

"It will be manifest that a single steam box might be made to answer the purpose of the two, but the two are preferred, as being less cumbrous, more easily made, and answering the purpose better than one of double size."

Patents Re-issued in the month of January, 1845.

1. For the Management and Generation of Heat in the Manufac ture of Iron; C. E. Detmold, of New York, assignee of Von Faber Du Four, of Wertemberg,-granted April 16, 1842, to run fourteen years from the 12th of May, 1841, the date of the first patent granted abroad-January 2, 1845.

The original patent for these improvements belongs to the hiatus in our list which we hope soon to fill up, therefore we shall simply insert the claims under the re-issued patent, for the benefit of those who have made themselves acquainted with this valuable invention. Claim. I claim the collecting and drawing of the combustible gases, chiefly consisting of carbonic oxide gas, from blast and other furnaces, at one or more points below the top of the fuel in said furnaces, substantially as set forth, for the purpose of employing said gases instead of other fuel, for heating all kinds of furnaces used in various processes of manufacturing and working iron or any other metal, and for heating steam boilers or any other structures requiring a high temperature. I claim the above described mode or any other substantially the same, of generating combustible gases from any kind of fuel in separate furnaces or chambers, and conducting the same to other furnaces or structures that are to be heated by the combustion of said gases.

"I claim the mode, or any other substantially the same, of forcing through a system of blow pipes or in any other convenient manner, heated air in numerous small streams and under a pressure greater than that of the atmosphere, into the said combustible gases in the furnaces or structures, where the same are to be used for the purpose of producing by the rapid and intimate mixture of the heated air with the combustible gases, their immediate and complete combustion."

List of American Patents which issued in the month of December, 1841, with Remarks and Exemplifications. By CHARLES M. KELLER, late Examiner of Patents in the U. S. Patent Office. (Continued from Page 109.)

23. For improvements in Propelling Vessels; Thomas J. Wells, New York city, New York, December 23.

The propellers, two in number, are arranged with their axes in the direction of the length of the boat, and therefore parallel to each other, and are pointed at each end, and in their general form resemble a segar; they are sustained on journals at each end, and are provided with spiral paddles along a portion of their entire length. It is proposed sometimes to make use of these propellers as the only means of giving buoyancy, and at others to add, to assist them in this office, a partial hull or hulls.

Claim." What I claim therein as new, and desire to secure by letters patent is the employment of buoyant screw propellers for steamboats, so constructed and arranged as that they shall constitute buoyant portions of the boat, which propellers may in this case be nearly or entirely submerged.

"I also claim the use of such propellers, so arranged and combined with the boat, as that the huil of the boat itself shall dip in the water and concur with the propeller or propellers in giving the whole construction the requisite degree of buoyancy, the said propellers and boat being constructed and arranged substantially in the manner herein set forth. And I do hereby declare that I do not claim the use of buoyant propellers generally, such propellers having been used, or proposed to be used, with their axes crossing the boat, but I limit my claim to the use of buoyant screw propellers, placed like other screw propellers, in the direction of the length of the boat, as herein set forth."

24. For improvements in the Syphon for Transferring Liquids ; George Johnson, New York city, New York, December 23.

The first improvement claimed is for charging single or double syphons by means of a bulb connected with the upper part or bend of the syphon, the bulb being of sufficient capacity to contain as much water as will fill the syphon. The second improvement claimed is for shielding syphons against reaction when one leg is to be used in

warm water, by means of a shield or sleeve surrounding the leg of the syphon. And the third improvement claimed, is for the manner of combining the bulb with a double syphon by means of a tube passing from the inner syphon through the neck of the bulb which is of sufficient capacity to form the communication with the outer syphon around this tube.

We are under the necessity of omitting the claims, as they refer to the drawings.

25. For an Ignitable Compound for Friction Matches; Norman T. Winans, Theodore Hyatt, and Thaddeus Hyatt, New York. December 23.

The disclaimer and claim on which this patent is granted, will give the reader a clear notion of the nature of the invention, viz: “What we claim therefore is not glue rendered damp proof by being chemically united with shellace, as this is an old discovery in the arts. Nor do we claim the union of glue and phosphorus either alone or with other inflammables, as these have been known and used for years.But we do claim phosphorus either alone or in connexion with other inflammables in combination with glue or gum rendered damp proof by being chemically or mechanically united with shellace for the use and purposes set forth."

26. For an Inflammable Compound for Friction Matches; N. T. Winans, Theodore Hyatt, and Thaddeus Hyatt, New York, December 23.

As in the preceding we deem the disclaimer and claim sufficient. Claim. "We do hereby declare that we do not mean to limit or confine ourselves to the precise proportion of the respective ingredients used by us, as this may be varied to some extent without changing the nature of our improvement, nor do we claim the using of a solution of shellace or other resin as a part of this compound, when such solution is made by means of alcohol or spirits of turpentine; but we limit our claim to the employment of an aqueous solution of the resin made by the agency of an alkili or the salt of akali prepared as described, in combination with phosphorus, substantially in the manner and for the purpose made known.

27. For improvements in the Cooking Stove; Eli C. Robinson, Troy, Rensselaer county, New York, December 30.

The claims in this case refer to and are wholly dependent on the drawings, and therefore, we shall omit them, as we do not deem this of sufficient importance to introduce them. The claim is to the method of combining the stove with an elevated oven, whether rotary or sliding, in such a manner as to preserve the communication with the chimney. In the rotary, the elevated oven is connected with the rotary top, and the escape pipe in the elevated oven is placed in the middle and turns in a collar attached to the permanent frame, in which the whole rotates. And in the sliding oven there is a plate