Chemical engineering . needed for qualitative min-eral analysis. A small kerosene stove and a copper kettle,placed on the highest shelf of the table, gives a constant sup-ply of hot distilled water. On opposite sides of the bottom ofthe kettle are two small bibbs, to which are fastened smallrubber tubes, having at each outer end a pointed glass tube,and sufficiently long to reach both ends of the table. AMohr pinch cock regulates the flow of water to a nicety,and the 4-foot head gives sufficient pressure to wash thor-oughly and quickly precipitates, filters, etc. This arrangementavoids the dis
Chemical engineering . needed for qualitative min-eral analysis. A small kerosene stove and a copper kettle,placed on the highest shelf of the table, gives a constant sup-ply of hot distilled water. On opposite sides of the bottom ofthe kettle are two small bibbs, to which are fastened smallrubber tubes, having at each outer end a pointed glass tube,and sufficiently long to reach both ends of the table. AMohr pinch cock regulates the flow of water to a nicety,and the 4-foot head gives sufficient pressure to wash thor-oughly and quickly precipitates, filters, etc. This arrangementavoids the discomfort arising from continued inflation of thecheeks which the ordinary wash-bottle necessitates. A sinkof glazed clay with drainboards is placed at the end of thetable. A table opposite the main working table is reserved forelectrolj-tic analysis, and is equipped with an accumulator,which is used as the source of current. The current strength \ at CROSS SECTION 1 1 -WO ? 119^ i/f ?y SCALE BOOM {7 6> 10 ?, o. lie. 1.—, ARRANGEMENT OF LABORATORY AND ASSAY OFFICE FOR A SMELTING PLANT. larly which have to be analyzed for insolubles, silica, iron,lime, zinc, sulphur, lead, copper, alumina, manganese, ar-senic and antimony. Every fourteen days, both flue-dust and speiss are testedfor their copper and lead contents, and occasionally a com-plete analysis of these products is required. The lead bullionis analyzed for its content of iron, copper, arsenic, antimonyand bismuth. In addition to the routine work mentionedabove, an analysis of coal or coke for the percentage of ash,sulphur, volatile matter and fixed carbon, as well as a de-termination of its calorific aluc, is called for, and occasion-ally an analysis is made of refractory brick and of gas. Thechemist, in order to do all this work, must devote his entiretime for ten hours every day. The above-named conditionsare not hypothetical, but have actually occurred in the au-thors own experience at a large lead smelter. T
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
