7 4 FLINT GENUS. Not particularly heavy, approaching the heavy. Specific gravity—3,941, Werner—3,718, Klaproth. Constituent Parts. Silica 40,0 Alumina 28,50 Magnefia 10,00 Lime 3>5° Oxyd of iron 16,50 of manganefe 0,25 Lofs 1,2 5 ICO Klaproth, t. 2. p 21. Geogno/lic and Geographic Situation. 1 Occurs imbedded in ferpentine at Zceblitz in Sax ony, and in Wacce in the Bohemian Mittelgebirge. In Bohemia it is mod commonly found in alluvial land, which has been formed by the decompofition oi the neighbouring floetz trap rocks, accompanied with cryflals of fapphire and hyacinth. At the Ely »» I ifefhii e in Scotland, it is found in the fand on the fea fhore, and is probably derived from the neigh bouring floetz trap rocks. - ) life.