sliver is passed through another combing machine, and subjected to the action of finer teeth. The follow ing processes are drawing, roving, spinning, and twist ing.-Industl'ial Record. OZOKERIT. OZOKERIT, the best electrical insulator known, is a fossil paraffine, sometimes called earth-wax. It is not abundantly distributed, for its production is confined to a few localities, chiefly in Moldavia and Galicia, where in surface mines it is dug up in nodules of about the size of p'otatoes. According to Gmelin, the ozokerit from Slamk in Moldavia is leek-green or yellowish brown, translucent, flexible, and of the consistence of tallow or wax. Its specific gravity is 0'955 to 0'97; its melting point, 82 deg. Cent.; its boiling point, 210 deg. Cent.; and on distillation it yields gaseous, oily, and solid hydrocarbons, leaving 5'7 per cent. of carbon in the retort. It is slightly soluble in boiling absolute alcohol; it dissolves completely in bisulphide of car bon, rock oil, and oil of turpentine; it forms a jelly under benzol, and does not dissolve completely until it is warmed. Ozokerit from Zietriska, in Moldavia, melts at 84 deg. Cent., boils at 300 deg. Cent., specific gravity 0'946 at 20 5 deg. Cent. It is not attacked by alkalies, it softens in chlorine, and becomes soluble in boiling ether; it is not affected by cold sulphuric acid, but is carbonized by it when hot. The ozokerit from Trascowiec in Galicia melts at 59 deg. Cent. to (l.� deg. Cent. Ozokerit from Boryslaw, in Galicia, is dark brown, and can be kneaded by the fingers; its melting point is 60 deg. Cent.; its specific gravity, 0'944. Its solution in boiling alcohol deposits, on cooling, crystals of the three forms in which paraffine crystallizes. By fractional crystallization it yields products melting at 60 deg. Cent. to 65 deg. Cent. of the same composition as paraffine. That melting at 61 deg. Cent. contains 84'94 per cent. of carbon, and 14'87 per cent. of hydro gen; that melting at 65'5 deg. Cent., 85'78 per cent. carbon, and 14 29 hydrogen. This ozokerit, when melt ed at a high temperature, is altered, and becomes softer than the natural substance. The solid product obtained by the dry distillation of melted ozokerit crystallizes from boiling alcohol in laminal, which differ from wood tar paraffine in their high melting point,
