FULLER'S Emirti. But little Fuller's earth is now employed for fulling cloth, its principal use being for decoloring oils and fats. Florida, Arkansas, California, Georgia, Massa chusetts and Texas are the principal price with 80 per cent from Florida at an average price of $10.62 a ton. The vast deposits between the Black Hills and Big Bad Lands in South Dakota are not yet utilized.
This mineral is considerably harder and tougher than quartz and is used as an abrasive for leather and wood. and general grinding and polishing. The principal supply comes from Adirondack Mountains, and from New Hamp shire and North Carolina.
Gusts A sand of much more than ordinary purity is required for high grade glass. Uniformity of size of grain and low percentage of iron, magnesia and clap are important requisites. Illinois, southern New Jersey, West western Maryland, Missouri and Ohio are the princip producers with sma amounts from a dozen other States. The friable Peter sandstone of Illinois is the source of about 500,000 tons a year.
Gitarmrrs. Graphite or " black lead year. occurs mostly inmetamorphic rocks either in grains or in veins of various sizes. Some deposits are coal beds baked by igneous rocks. Most of the domestic production is from Alabama and the southeastern slope of the Adirondack, in New York. Texas, Pennsylvania and California. An amorphous variety comes from near Providence. R. I. Much artificial graphite is produced in electric furnaces at Niagara Falls. The chief uses are " lead " pencils, lubricants, crucible, stove polish and paint. A large amount is imported. Ohio with 22 quarries leads in the pro duction of grindstones but there are also quarries in Michigan and West Virginia.
This mineral when roasted and ground is plaster of Paris. It occurs in large amounts in many parts of the western United States, notably New Mexico, Wyoming, Utah and Texas, but New York, Michigan and Iowa yield the largest part of the product. The usefulness of the deposit depends largely on its proximity to markets. IRON Oas. About 82 per cent of the ore is mined in the Lake Superior region. The Birmingham district in Ala Lama contributes about 10 per cent and smaller iunounts come from New Jersey, New York. Pennsylvania, Georgia, Tennessee, North Carolina and some other States. The amount mined in the Far West is about 1 per cent. Iron ore being pre-eminently a war mineral the production was greatly increased in 1915 and succeeding years. Iron ores containing manganese have lately become very important because of diminution of foreign shipments of manganese during the war and the great need of that metal in steel making. Manganiferous iron ores occur most extensively
in the Cuyuna district. central Minnesota, but smaller deposits at Leadville, Colo., Philipsburg. Mont.. Tomb stone, Ariz., and Franklin, N. J., and near Batesville. Ark., are also producing.
A large amount of lead is produced in the reduction of silver ores, especially when the price of silver is high. Missouri leads in lead production with Idaho not far behind, Utah third and Colorado far behind as fourth. Smaller amounts come from Nevada. Arizona, Montana, Oklahoma, Wisconsin and a few other Western States. Lists arm Lisassturis. Limestone is quarried In part for burning and in part for building stone in 43 the 48 States and large bodies of the rock are in proximity to the larger industrial centres. Production in the Western States is relatively small because of limited market. A large amount of limestone is used for Portland cement and road metal. Some is used in agriculture.
Lrrsrusz Misisams. Lithia salts are used in small amounts in manufactured mineral waters and in storage batteries. Spodumene and amblygonite from the Black Hills, and lepidolite (lithia mica) and amblygonite from near Pala in California, are the principal sources.
Maosissrrs. Carbonate of magnesia extensively used in the basic open-hearth process of steel making is mostly produced from mines near Porterville. Tulare County, C,al. Smaller amounts come from adjoining counties and from newly discovered deposits of crystalline mineral 60 miles north of Spokane, Wash.
As this metal is required in large amounts in modern steel-making, the ore is in great demand. Much is imported. Most of the mines in the United States are in Georgia, California. Virginia and Arkansas. Manganiferous iron ores, ores in some of the silver mines and residue from zinc ore of Franklin, N. J., are also native sources of the metal.
Maus. Marls containing the potash-bearing greenrand. glauconite, are dug in southern New Jersey and eastern Virginia for fertilizer both for direct use on the fields and for admixture with fish scraps.
With the vast increase in manufacture of electrical supplies mica production is continually increasing, espe cially as the small plates are now utilized for insulating. Ground mica is also in demand and mica board is made by coin small fragments. The principal supply comes from North Carolina and some is mined in the Black Hills of South Dakota, New Hampshire and Vir ginia. Much is imported from Canada and India.