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MENACHANITE. 339 It retains its colour in the streak. It is easily frangible. It is heavy in a moderate degree. Specific gravity, 4.427, Gregor. 4.270, Lampadius. Physical Character. It is attractive by the magnet, but in a much weaker degree than iron-sand or magnetic ironstone. Chemical Characters. It is infusible, without addition, before the blowpipe : it tinges borax of a greenish colour, which inclines to brown. Constituent Parts. Cornwall. Oxide of Iron, - 51.00 Oxide of Titanium, 45.25 Oxide of Manganese, 0.25 Silica, - 3.50 100.00 Klaproth, Beit. b. ii. s. 231. Gcognostic and Geographic Situations. It is found, accompanied with fine quartz-sand, in the bed of a rivulet which enters the valley of Menaccan in Cornwall; on the shores of the Island of Providence in America ; the vicinity of Richmond in Virginia ; and at Botany Buy in New South Wales. v 9 Observations. Botany Bay. 49 40 11 100 Chenevix, in Ni cholson’s Journ. vol. v. p. 132. 1 »•