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nd strength, it is not affected by the presence of sulphur in the food, — as by eggs, for instance. Dr. Fowler, of Yarmouthport, Mass., obtained patents for its combination with vulcanite as applied to dentistry and other uses, February 7 and 14, 1865. It resists sulphur in the process of vulcanization in a manner which renders it an efficient and economical substitute for platinum or gold. Aluminium is derived from the oxide, alumina, which is the principal constituent of common clay. Le easily fused metals into a molten state, and then to mix those less fusible with them in the form of shreds, particles, fine wire, or thin plates. Aluminium and its alloys are combined with vulcanite in the patents of Fowler, February 7 and 14, 1865. According to some analyses, wootz (East Indian steel) is alloyed with aluminium. Lancaster's (1858, England) gun-metal : copper, 90; aluminium, 100. Alum Leath′er. Leather tanned by a composition of alum and salt. Three pounds of s
,492LeslieOct. 18, 1870. 108,787HowardNov. 1, 1870. 116,715JohnsonJuly 4, 1871. 123, 168GoodrichJan. 30, 1872. 124,853PetersonMar. 19, 1872. 125,032DaltonMar. 19, 1872. 125,608MooreApr. 9, 1872. 126,467Lawrence et al. May 7, 1872. 129,352LeslieJuly 16, 1872. 131,857DaltonOct. 1, 1872. (Reissue.)6,159ArnoldDec. 1, 1874. 7. (b.) Reciprocating Blades. No.Name.Date. 36,074Crosby et al.Aug. 5, 1862. 37,033Crosby et al.Dec. 2, 1862. 37,550PipoJan. 27, 1863. 46,424RobjohnFeb. 14, 1865. 50,225CrosbyOct. 3, 1865. 50,473HechtOct. 17, 1865. 58,376CaryOct. 2, 1866. 89,085ScharffeApr. 20, 1869. 93,063DavisJuly 27, 1869. 93,979EverissAug. 24, 1869. 106,788DavisAug. 30, 1870. 108, 486JohnstonOct. 1, 1870. 111,130MackJan. 24, 1871. 111,458JohnstonJan. 31, 1871. 112,882ZayMar. 21, 1871. 118,759ToofSept. 5, 1871. 120,173ToofOct. 24, 1871. 120, 722DarbyNov. 7, 1871. 120,817HowardNov. 14, 1871. 122,268LyonDec. 26, 1871. 122,611JohnstonJan. 9, 1872. 123,115LyonJan