(20) J. T. S.--Engines with automatic cut-offs will run steady with variable work. If you have a governor that only controls a throttle valve, there will be a small variation of speed with as much variation in the work as you state. Much depends upon the relative amount of work absorbed by the mill and the variable machinery. TO INVENTORS. An experience of forty years, and the preparation of more than one hundred thousand applications for patents at home and abroad, enable us to understand the laws and practice on both continents, and to possess unequaled facilities for procuring patents everywhere. A synopsis of the patent laws of the United States and all foreign countries may be had on application, and persons contemplating the securing of patents, either at home or abroad, are invited to write to this office for prices, which are low, in accordance with the times and our extensive facilities for conducting the business. Address MUNN & CO., office SCIENTIFIC AMERICAN, 361 Broadway, New York. INDEX OF INVENTIONS For which Letters Patent of the United States were Granted February 8, 1887, =AND EACH BEARING THAT DATE.= [See note at end of list about copies of these patents.] Account register or coin counter, L. Benham. 357,361 Acid, concentrating sulphuric, J. B. F. Herreshoff. 357,528 Alarm. See Burglar alarm. Fire and burglar alarm. Albumen from blood, obtaining, T. Nordenfelt. 357,331 Anvil for steam hammers, A. E. Barnard. 357,546 Auger, earth, S. Albright. 357,544 Baling press, S. T. McCanless. 357,400 Bandage, suspensory, Miller & Maughmer. 357,494 Banjo, E. J. Cubley. 357,270 Basin or grease trap, settling, G. E. Waring, Jr. 357,349 Basins, alarm attachment for overflow, F. Brandt 357,307 Basket cover, A. S. Chamberlin. 357,466 Battery. See Galvanic battery. Bed bottom frames, machine for securing fabrics to, W. S. Seymour. 357,343 Bed bottom, spring, T. E. O'Brien. 357,224 Bed, sofa, G. E. Krause. 357,530 Bed, sofa, L. S. Trotter. 357,348 Bed spring, oscillating, J. R. Masters. 357,215 Bedstead fastening device, N. H. Waters. 357,252 Bee feeder, W. H. McWilliams. 357,493 Beer in fermenting tubs, apparatus for cooling, M. Gottfried. 357,196 Belt for transmitting power, F. M. Walker. 357,432 Bench. See Wash bench. Bit. See Bridle bit. Blind stop, L. T. Gulick. 357,381 Blind, window, J. Fawcett.