. The universal assistant, and complete mechanic : containing over one million industrial facts, calculations, receipts, processes, trade secrets, rules, business forms, legal items, etc., in every occupation, from the household to the manufactory. Fig. 30.—WHEELEa AXD RA2a)ALLS A M A ^ IT a TPTft PaX. It prevents amalgamation ; use live steam from the boiler for this purpose,but the former may be used in tlie steam cliamber if desired. The pulp, iftoo thick, causes awaste of power, if too thin it will not amalgamate well. After commencing to grind, the muUer should be gradually lowered ;

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. The universal assistant, and complete mechanic : containing over one million industrial facts, calculations, receipts, processes, trade secrets, rules, business forms, legal items, etc., in every occupation, from the household to the manufactory. Fig. 30.—WHEELEa AXD RA2a)ALLS A M A ^ IT a TPTft PaX. It prevents amalgamation ; use live steam from the boiler for this purpose,but the former may be used in tlie steam cliamber if desired. The pulp, iftoo thick, causes awaste of power, if too thin it will not amalgamate well. After commencing to grind, the muUer should be gradually lowered ; in2 hours the ore should be reduced to a fine pulp ;. at this period quicksilverie enprplled by pressing it through canvas, so as to scatter it throagn the pulp ITETALLTTRGT OF SILTHB. S)65 In A finely divided Ptete ; the muller is then slightly raised from the bottom,to aToid grinding the quicksilver, which would flour it, and the jiction ihcontinued for 2 hoars longer. Th9 proportions used to clitirgc one of these mns with 4 ft. muller are •ore t*ttie charge, liOOO lbs., quicksilver, 30 to 70 lbs., rarying witli the quality. Fig. 31.—Agitator.

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Keywords: ., bookcentury1800, bookdecade1870, booksubje, booksubjecttechnology