442 tin. zir t ir it r n, T nt ' ” fien even inc,!ni "s *> «■— L til, intermediate varieties are only translucent ana translucent on the edges. It yields a greyish-white streak. It is hard. It is easily frangible. It is brittle. It is uncommonly heavy. „. TfZT?*’ C 300 *•*»• Gdhn •• 6 ra ». Bnm. A ’ ’ Lcyarr, 6 90.I9, tile black, 6.9348, the red, Bnsson; 5.845 to 5 970, Klaprolh. Chemical Characters. Before the blowpipe it decrepitates, and becomes paler • when finely pounded, it is reducible on charcoal bv the continued act.on of the blowpipe, to the metallic state. Acids dissolve the iron it contains, but only a very mi nute portion of the tin. From Alternon, Tin. - 77.50 lr °n, - 0.25 Oxygen, . 21.50 SUica > - 0.75 Constituent Parts. Schlackenwald. 75.00 0.50 St. 50 100 loo Klaproth, Beit. b. ii. s. 256. Oxide of Tin, 9+ - 0 Oxide of Iron, ] qq Oxide of Manganese, 0.50 Silica, - - 1.00 Alumina, - 3.00 100 John, Chem. Untcrs. b. ii. s. 2i2. Ebrcnfriedersdorf. 68 9 16 7 100 Lampadittt. Zinwald. 97.15 00.35 2.50 100 Kuatncr, Beit, zu Bcgrundung einer Wissench.C’hcm. b. s. 26. Oxide of Tin, Oxide of Iron, Alumina, Gcoirnoslic o