634 COAL. This is the common coal of the British collieries. It is found also in Germany, Bohemia, Moravia, Belgium, Trance, Asturias, North America, China, Japan, Australia. 3. Brown coal.—Fracture conchoidal...earthy. Lustre waxy. Brown...black. Streak brown. H = ro...2 - 6. o = 0'5...1'5. Burns with a smoky flame and unpleasant smell. Imparts a dark brown colour to caustic potash. Analyses of brown coal a from Elbogen, b from Dax, c from the Meissner, d from Uznach, all by Begnault:— abed Carbon 73'79 70-49 71'71 60-04 Hydrogen 7'46 6 - 69 4‘85 5'70 Oxygen and nitrogen . . 13'79 18'93 21-67 36-07 Ash 4-96 4-99 1-77 2'19 Brown coal exhibits the structure of wood much more dis tinctly than the other varieties of coal. It occurs principally in the tertiary formations and in alluvium. It is found in various parts of Germany, Switzerland, Aix in Provence, Hungary, Italy, Greece, Iceland, Greenland, near Bovey Tracey in Devonshire, at the mouth of the Ouse in Sussex, in Scotland in Fife and Mid Lothian, and in the isles of Sky and Canna, in the Faroe isles, particularly in Suderoe, in Antrim in Ireland imbedded in trap.
