185.--SOAP.--Leberman & Co., Philadelphia, Pa. 186.--MEDICINE.--Ridenour, Coblentz & Co., Springfield, Ohio. 187.--PAPER.--Union Manufacturing Company, Springfield, Mass. * * * * * EXTENSIONS. WAGONS.--Edgar Huson, Ithaca, N. Y. Letters Patent No. 16,648, dated February 17, 1857; reissue No. 2,500, dated March 5, 1867. OPERATING VALVE OF STEAM ENGINE.--Samuel R. Wilmot, Bridgeport, Conn. Letters Patent No. 16,668, dated February 17, 1857. HINGES.--John David Browne, Cincinnati, Ohio. Letters Patent No. 16,678, dated February 24, 1857. KEEPER FOR RIGHT AND LEFT HAND DOOR LOCKS.--Calvin Adams, Pittsburgh, Pa. Letters Patent No. 16,676, dated February 24, 1857. SOLAR CAMERA.--David A. Woodward, Baltimore, Md. Letters Patent No. 16,700, dated February 24, 1857; reissue No. 2,311, dated July 10, 1866. CAST SEAMLESS THIMBLE SKEINS FOR WAGONS.--John Benedict, Kenosha, Wis., administrator of Andrew Leonard, deceased. Letters Patent No. 16,688, dated February 24, 1857; reissue No. 575, dated July 27, 1858; reissue No. 1,229, dated October 8, 1861. MODE OF CASTING SEAMLESS SKEINS FOR WAGONS.--John Benedict, Kenosha, Wis., administrator of Andrew Leonard, deceased. Letters Patent No. 16,688, dated February 24, 1857; reissue No. 575, dated July 27, 1858; reissue No. 1,228, dated October 8, 1861. BREECH-LOADING FIREARMS.--William Cleveland Hicks, Summit, N. J. Letters Patent No. 16,797, dated March 10, 1857; reissue No. 1,952, dated May 9, 1865; reissue No. 3,798, dated January 18, 1870; reissue No. 3,860, dated March 1, 1870. SEEDING MACHINE.--Lewis B. Myers and Henry A. Myers, Elmore, Ohio. Letters Patent No. 16,772, dated March 3, 1857. * * * * * DISCLAIMER. SOLAR CAMERA.--David A. Woodward, Baltimore, Md. Letters Patent No. 16,700, dated February 24, 1857; reissue No. 2,311, dated July 10, 1866. Filed February 23, 1871. * * * * * CITY SUBSCRIBERS.--THE SCIENTIFIC AMERICAN will be delivered in every part of the city at $3.50 a year. Single copies for sale at the News-stands in this city, Brooklyn, Jersey City, and Williamsburgh, and by most of the News Dealers in the United States. * * * * * RECEIPTS--When money is paid at the office for subscriptions, a receipt for it will be given; but when subscribers remit their money by mail, they may consider the arrival of the first paper a bona-fide acknowledgment of their funds. * * * * * ADVERTISEMENTS. * * * * *