Journal of electricity, power, and gas . sts. The decrease waslargely in the value placed on patent rights, good will,and contracts in 1907, and on treasury stock. Theamount expended for construction and equipment in-creased $888,156, or 280 per cent over 1907. and thenumber of employes 782, or 444 per cent; the increasein salaries and wages being $311,835, or 381 per cent. 138 JOURNAL OF ELECTRICITY, POWER AND GAS [Vol. XXXII—No. A NEW ELECTRIC SMELTING FURNACE. The availability of large deposits of iron, copperand lead ores in the West within reach of sources ofcheap hydroelectric power make
Journal of electricity, power, and gas . sts. The decrease waslargely in the value placed on patent rights, good will,and contracts in 1907, and on treasury stock. Theamount expended for construction and equipment in-creased $888,156, or 280 per cent over 1907. and thenumber of employes 782, or 444 per cent; the increasein salaries and wages being $311,835, or 381 per cent. 138 JOURNAL OF ELECTRICITY, POWER AND GAS [Vol. XXXII—No. A NEW ELECTRIC SMELTING FURNACE. The availability of large deposits of iron, copperand lead ores in the West within reach of sources ofcheap hydroelectric power make the electric smeltingof these ores a necessity of the near future. Manyfurnaces have been designed and much money spentin overcoming the difficulties of the electric reductionof ores. One of the simplest and most practical is thatrecently patented by Louvrier and Louis, its mainadvantage being its temperature regulation by meansof an electrode switch instead of movable can be used at high voltages and in all sizes up to. -J> Sectional Details Louvrier and Louis Electric Furnace. 40,000 , which the inventors claim is sufficient toproduce 500 to 550 tons of pig iron daily. The general arrangement of the furnace is indi-cated in the drawing, which represents a polyphasefurnace. Fig. 1 is a vertical section along 3-3 of Fig. 3. Fig. 2 is another vertical section along 4-4 of Fig. 4. Fig. 3 is a horizontal section along-1-1 of Fig. 1. Fig. 4is a horizontal section along 2-2 of Fig. 2. The furnace proper consists of three principalparts—the shaft A, wherein the progressive heatingof the ore takes place; the bosh B, which is the zoneof reduction, and the crucible C, where the moltenmetal accumulates. The crucible and the reductionchambers are lined with very refractory and non-conducting material D. The bottom S of the furnaceis conducting and is connected with one of the phasesof the current. It is made from varying material tosuit each particular case; for
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