determined only by an assayer. Eastern range of Appalachians, as Habersham, Rabun, Clark, Hall, Lumpkin and Lincoln Counties, Ga.; Abbeville, Chesterfield, Union, Lancaster and Pickens Counties, S. C.; Montgomery, Cabarras, Mechlenburg, Burke and Lincoln Counties, N. C.; Spotsylvania, Buckingham, Fauquier, Stafford, Culpepper, Orange, Goochland and Louisa Counties, Va.; Dedham, Mass.; Bridgewater, Vt.; Canaan and Lisbon, N. H.; on Sandy River and Madrid, Me. Numberless points along the higher Rocky Mountains and western slope of Sierra Nevada, as near Santa Fe, Cerillos and Avo, New Mex.; San Francisco, Wauba and Yuma District, Ariz; between Long’s Peak and Pike’s Peak, Col.; Comstock Lode, Nev.; Owyhee, Boise and Flint Districts and Poorman Lode, Idaho; Emigrant and Alder Gulches, Red Bluff and near Jefferson River, Mont.; Josephine District, Powder, Burnt, and John Day Rivers, western slope of Cascade Mountains, and southern coast, Oregon; Tulare, Fresno, Mariposa, Tuolumne, Calaveras, El Dorado, Placer, Nevada, Yuba, Sierra, Butte, Plumas, Shasta, Siskiyou Amador and Del Norte Counties, Cal. Rare in the coal-regions and Mississippi Valley.
34.—Graphite.
Occurs in foliated, scaly and granular masses; can be cut into thin slices, which are flexible, but not elastic; impressible by the nail; feels greasy; leaves a shining trace on paper; metallic lustre; not altered by heat or acids; gravity 2.
Value.—Used for pencils, polishing, glazing, for making steel, crucibles, overcoming friction, etc.
Localities.—Found in granite, slate and limestone rocks. Sturbridge, North Brookfield, Brimfield, Hinsdale and Worthington, Mass.; Cornwall and Ashford, Conn.; Brandon, Vt.; Woodstock, Me.; Goshen, Hillsboro and Keene, N. H.; Ticonderoga, Fishkill, Roger’s Rock, Johnsburg, Fort Ann, Amity, Rossie and Alexandria, N. Y.; Franklin and Lockwood, N. J.; Southampton and Buck’s County, Penn.; on the Gunpowder, Md.; Albemarle County, Va.; Wake, N. C.; Tiger River and Spartanburgh, S. C.; Sonora, Cal. (The soft black slate, often mistaken for Graphite, leaves a coaly trace on paper not a shining streak.)
35.—Gray Copper Ore.
Occurs in crystallized or granular masses; metallic lustre; color between steel-gray and iron-black; brittle; the powder dissolved in nitric acid makes a brownish green solution; melts at a red heat; gravity 5.
Value.—An ore of copper, (containing thirty-three per cent.) and silver, of which Nevada specimens have sixteen per cent.