3d, In a vacuum still for distilling oil, a series or coil of steam jet pipes, e, in combination with a series or coil of evaporating pipes, a, substantially as and for the purposes above set forth. 4th, Combining together a series of apparatus, such as hereinbefore described, for the purpose of procuring a continuous distillation of petroleum, each member of a series consisting of a vacuum still containing a coil of steam pipe as evaporating surfaces, and troughs for the gradual distillation of the oil, in combination with suitable condensing apparatus, substantially as and and for the purposes hereinbefore set forth. 5th, A vacuum residnum receiver D, connected to and in combination with a vacuum still, or a battery of such stills, substantially in the manner and for the purposes above set forth. 72,126.--DISTILLING HYDROCARBON OILS.--Herbert W. C. Tweddle, Pittsburg, Pa. I claim, 1st, In distilling hydrocarbon oils, vaporizing the oil by causing it to flow in a thin film or layer over the surfaces of a series of heated pipes in a vacuum still, with or without the application of superheated steam, substantially as above described. 2d, The application of the process of distillation, hereinbefore described, to the re-distillation of fire-distilled oils, for the purpose of producing an oil similar to the refined oil of commerce, substantially as above set forth. 3d, Securing a continuous and complete distillation of hydrocarbon oils by causing the oil to flow over the surfaces of a succession of heated pipes in different vacuum stills, the temperature of such pipes increasing in each successive still, so as to drive off at first more volatile ingredients, and then those less so, and so on till only the residuum remains, substantially as hereinbefore described. 72,127.--GRAIN DRILL.--Joseph G. Yale, Cumberland Co, Pa. I claim the quarti-elliptical shovel, B, with its base, E E', coming to a point at E, the rod, C, the rod, H, with thereon the balls, D and D', together with the funnel, A, all constructed and operating in the manner and for the purpose described. 72,128.--WINDOW-SASH STOP.--George R. Vanderbilt (assigner to himself, J. J. Lindstrom, and D. W. Stidolph), Mount Vernon, N.Y. I claim, 1st, The two clamping plates, and the tightening bolt, combined and operated substantially as and for the purpose specified. 2d, The springs, arranged in relation to the plates, c d, substantially as and for the purpose specified. 72,129.--MUSICAL INSTRUMENTS.--George W. van Dusen, Williamsburg, N.Y. I claim the combination and arrangement of lever, V, with finger piece, Y, at one end and stud, b, at the other valve, G, and air passage, E, closed by a flexible diaphragm, K, substantially as herein described, and for the purpose of producing, by means of air, an action upon any suitable sound-producing mechanism through the movement of a sheet or strip perforated, or in any other eqivalent manner prepared.