VALUE.--Used for mosaics and other ornaments when compact, fine-grained and bright color. LOCALITIES.--Found everywhere. Sugar Loaf Mountain and Machiasport, Me.; Saugus, Mass.; Castleton and Colchester, Vt.; Bloomingrove, N. Y.; Murphy’s, Col.; Red Bluff, Mont. 40.--KAOLIN. Occurs in beds; it is a fine, white clay, plastic when wet; when dry is scaly or compact; can be crumbled in the fingers and feels gritty; adheres to the tongue; does not dissolve in acids. VALUE.--Used for the finest porcelain and for adulterating candy. LOCALITIES.--Found generally with iron-ore and fire-clay. Common on the eastern slope of the Alleghanies; Branford, Vt.; Beekman, Athol, Johnsburgh and McIntyre, N. Y.; Perth Amboy, N. J.; Reading, Tamaqua and New Garden, Penn.; Mt. Savage, Md.; Richmond, Va.; Newcastle and Wilmington, Del.; Edgefield, S. C.; near Augusta, Ga.; Jacksonville, Ala. 41.--LENTICULAR IRON ORE. Occurs in beds or masses, consisting of minute flattened grains; little lustre; generally soils the fingers; breathed upon has a clayey odor; color, brownish-red, powder more red; dissolves in strong muriatic acid with some effervescence; brittle; gravity 4. VALUE.--An ore of iron yielding thirty-three per cent. Generally mixed with other ores at the furnace. LOCALITIES.--Found in sandstone. Wayne, Madison, Oneida and Herkimer Counties, N. Y.; Marietta O. 42.--LIMONITE, OR BROWN HEMATITE. Occurs in masses, with smooth rounded surfaces and fibrous structure; sometimes as hollow nodules, which are velvety-black inside; its powder when rubbed is yellowish-brown; when strongly heated turns black; scratches glass feebly; brittle; dissolves in hot aqua-regia; gravity 4. VALUE.--A common ore of pig-iron, containing sixty per cent.; used also for polishing buttons, etc. LOCALITIES.--Found in heavy beds with mica-slate, quartz, limestone, etc. Salisbury and Kent, Conn.; Amenia, Fishkill, Dover and Beekman, N. Y.; Richmond and Lenox, Mass.; Pittsfield, Putney, Bennington and Ripton, Vt.; Hamburgh, N. J.; Pikeland and White Marsh, Penn.; Marquette, Mich.; Makoquata River, Iowa; Iron Mountains, Stow and Green Counties, Mo.; Centerville, Ala.; near Raleigh and Smithfield, N. C.; on Coal Creek, Col.; and in coal areas generally. 43.--MAGNETIC IRON ORE. Occurs in granular masses, coarse or fine; attracted by the magnet, or affecting the compass-needle; powder black; brittle; dissolves in muriatic acid; gravity 5. VALUE.--An important ore, yielding sixty-five per cent.