Journal . n the Mnnufacture of Cement and Porcelain. OwainHughes, Bangor. Eng. Pat. 2619, February 22, 1888. to this invention, cement is manufactured fromground slate in conjunction with lime; and slate waste,ground or otherwise, may be used as a substitute for trass,pazzolanos, clay, or any matter in which silica, alumina,alkalis, iron, manganese, magnesia, or any other ingre-dients foimd in slate, are present, for the manufacture ofcement in combination with lime.—E. G. C. -4/1 Improved Oil Cement. W. Alber, Berlin, Germany. Eng. Pat. 7020, May 11, 1888. inventor claims
Journal . n the Mnnufacture of Cement and Porcelain. OwainHughes, Bangor. Eng. Pat. 2619, February 22, 1888. to this invention, cement is manufactured fromground slate in conjunction with lime; and slate waste,ground or otherwise, may be used as a substitute for trass,pazzolanos, clay, or any matter in which silica, alumina,alkalis, iron, manganese, magnesia, or any other ingre-dients foimd in slate, are present, for the manufacture ofcement in combination with lime.—E. G. C. -4/1 Improved Oil Cement. W. Alber, Berlin, Germany. Eng. Pat. 7020, May 11, 1888. inventor claims a cement composed of oxide of leadsaturated with linseed oil, and mixed with Venice turpen-tine, litharge, and manganese borate.—E. G. C. , MINING, Etc. Manufacture of Cupels. F. C. Blake. Journ. Anal. Chem.,Vol. II., Pari 3. July 1888. The apparatus described is now in use for the making ofall sizes of bone-ash cupels used in assaying at the works ofthe Pennsylvania Lead Company. Fig. 032 THE JOURNAL OF THE tsOCIETY OF CHElSaCAL INDUSTRY. [ It works rapidly and easily, and turns out cupels thatare very uniformly compressed, and that <;ive under similarconditions exceedingly regular silver absorptions -nhich areas low as those of the best hand-made cupels, or of cupelsthat we have tested, made hy other machines. The cupel-pressing machine is a No. 7 upright leverpress of the regular style, made by the K. W. i^liss Co., ofBrooklyn, Lever presses that could he easily adaptedto the Avork are made by several other manufacturers. Thepress is shown by Fig. 1. The opening at the centre ofthe bed-plate is filled by a removable plug made flush with the plate. Planks are fitted around the bed-plate and the backpart of the press, forming a table, 38 x 48 inches, with thepress in the centre. This arrangement is shown by Fig. 2,which is taken from a photograph. On each side in front are boxes for holding bone-ash andthe tools not in use. A guard ex
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
