2d, The fitting of the derrick frame, J, on the wagon frame, as shown, to wit by means of the circular plate, D, frame, F, and circular plate, G, with the wheel, E, and pinion, Y, to admit of the ready turning of the derrick, as set forth. 3d, The supports, D, provided with screws, a, and attached to the frame, B as shown, in connection with the levels, b, in platform, C, for the purpose of levelling the device, substantially as described. 4th, The angular platform, C, applied to the wagon, A, when used in combination with a revolving derrick frame, J, substantially as and for the purpose specified. 72,065.--AUGERS.--John A. McGee (assignor to Theodore Mace), New York city. I claim the boring instrument formed with a cutting edge extending outwardly from the base of the tapering screw, and curved backwards and downwards until it intersects the periphery of the tool, as and for the purposes set forth. 72,066.--DRY DOCK.--Israel J. Merritt, New York city. I claim, 1st, The arrangement and combination with a floating section or dock, A, of one or more wells, through which a lifting chain or chains are passed down to the vessel or object to be raised, substantially as described. 2d, The arrangement and combination of the lever, J, with the floating dock or section, A, and chain or chains, C, substantially as described. 3d, The shape of the well, B, the same being made flaring from its top downwards, so as to allow the chains to go or be conducted from the mouth of the well directly towards the vessel or object to be raised, substantially as shown. 72,067.--KNIFE AND FORK CLEANER.--John Merritt, New York city. I claim, 1st, The combination of the circular disks, D, leather or equivalent rubbers, K, shaft, A, holding plates, E E', adjusting nut, G, and adjusting screw, I, with each other and with the box, B, substantially as herein shown and described, and for the purpose set forth. 2d, The combination of the friction wheel, O, brush, N, and shaft, L, with each other, and with the disk, D, and box, B, substantially as herein shown and described, and for the purpose set forth. 3d, The combination of the lever, M, spring, P, and hook, R, with the brush shaft, L, and box, B, substantially as herein shown and described, and for the purpose set forth. 72,068.--MANUFACTURE OF LAMP BLACK.--A. Millochan, New York city, assignor to R.N. Perlee, Jersey City, N.J. I claim the method herein specified of manufacturing lamp black by condensing the carbonaceous vapors upon a surface directly over the flame, that is constantly kept sufficiently cool by artificial means. 72,069.--CAR BRAKE.--James Mitchell, La Porte, Ind. I claim, 1st, The combination of the lever, A, rod, B, lever, C, pawls, D and D1, spring, D2, and ratchet wheel, E, substantially as and for the purpose set forth. 2d, The combination of the shaft, E3, collar, R, arm, R', collar, S, and shaft, I, substantially as set forth.