I claim combining the breech block, A, hinged at its posterior extremity, and operating as described, with the hammer, D, by means of the protuberant inclined plane, C, or its equivalent, substantially as described for the purposes specified. 72,077.--RAILWAY CROSSINGS.--Stanhope Perkins, Fairfield, England. I claim forming the points or V-parts of crossings, without splice, by bending the rail, prepared as above described, back upon itself, and securing the abutting parts in the manner and for the purpose above set forth. 72,078.--MANUFACTURE OF LAMP BLACK.--R.N. Perlee, Jersey City, N.J. I claim the method herein specified of manufacturing lamp black, by introducing atmospheric air to the flame, by artificial means, for the purposes set forth. 72,079.--AXLE BOX.--Henry B. Pitner, La Porte, Ind. I claim, 1st, An axle box, substantially as shown and described, and for the purpose set forth. 2d, The sleeve or thimble, A, in combination with the end pieces, B, substantially as shown and described, and for the purposes set forth. 3d, The shoulder, a1, and the shoulder, a2, in combination with the sleeve A, and end pieces, B, substantially as shown and described, and for the purposes set forth. 72,080.--RAILWAY CHAIR.--Leander Pollock, (assignor to himself and John P. Schenck, Jr.), Matteawan, N.Y. I claim 1st, A railroad-chair which is divided by an inclined line drawn through the base, into two parts, A and B, each part carrying one of the cheeks, and all made and operating substantially as herein shown and described. 2d, Interposing an elastic plate, g, between the edge of the upper base, d, and the stationary cheek, a, substantially as and for the purpose herein shown and described. 72,081.--VENTILATING HAY-MOWS.--Geo. Race, Norwich, N.Y. I claim making vertical perforated pipes, having lateral branches extending out from the main pipe for the purpose of ventilating hay-mows, and stacks of hay or grain, substantially as herein set forth. 72,082.--PNEUMATIC CAR.--Louis Ransom, Lansingburg, N.Y. I claim in combination with a pneumatic car, a series of metal cylinders for containing compressed air, the said cylinders being connected by pipes, so as to form one common reservoir substantially as described. 2d, I also claim the combination, with a stove for warming the car, or other heating apparatus, a conducting pipe, for the compressed air, so located with reference to the stove or other heating apparatus that the compressed air in passing through it will become heated, and have its expansive power increased thereby, substantially as described. 3d, I also claim the compound flexible pipe, constructed substantially as described. 4th, I also claim the muffler, D, for the purpose of deadening the sound of the escaping air as described. 72,083.--MACHINE FOR SHARPENING SAWS.--E.B. Rich, (assignor to himself and Andre Cashing), Boston, Mass.