. Electrical world. ow the other. The cathode plates are removable so that the de-posited metals may be scraped off. The partially extracted pulp isthen passed through a rififle trough into a leaching tank. Finally,the partially extracted pulp is subjected to filtration or decantationand the liquor is heated and subjected to electrolysis. ELECTRIC FURNACE INVENTION. A patent was granted on April 12 to Mr. Henry Noel Potter, ofNew York City, who has for some time been engaged in developinga convenient tube furnace. He uses a carbon tube lined and coatedexternally with fused magnesia which, unde
. Electrical world. ow the other. The cathode plates are removable so that the de-posited metals may be scraped off. The partially extracted pulp isthen passed through a rififle trough into a leaching tank. Finally,the partially extracted pulp is subjected to filtration or decantationand the liquor is heated and subjected to electrolysis. ELECTRIC FURNACE INVENTION. A patent was granted on April 12 to Mr. Henry Noel Potter, ofNew York City, who has for some time been engaged in developinga convenient tube furnace. He uses a carbon tube lined and coatedexternally with fused magnesia which, under such conditions, doesnot shrink under the action of heat. The tube is also well jacketedby some good heat-resisting material, such as calcium oxide. Thepresent patent relates to mechanical details of the arrangement forrevolving the furnace and for supplying the current to the is shown diagrammatically in Fig. I. The furnace is provided withone or more transformers, the secondary of which feeds metallic. POTTER ELECTRIC FURNACE. split rings forming the terminal connections of the furnace. Themethod of revolving the furnace is clearly shown in the illustration,and it will be seen that the material to be healed is passed in fromthe upper end and the rotation of the furnace causes the charge tofeed regularly the lower end. A patent granted on April 12 to Dr. G. Eilwein, of Berlin, Ger-many, relates to the manufacture of calcium cyanide from mixturescontaining either calcium oxide and charcoal or calcium carbonateand charcoal, in the electric furnace, while nitrogen is conductedeither over or through the mixture. It is stated that it is not neces-sary to employ theoretically correct proportions of the mixture, andthat one may add to good advantage more charcoal or organic sub-stances containing carbon, such as sawdust, pitch, tar or the like. PRODUCING CHEMICAL COMPOUNDS FROM CALCIUM CARBIDE. The chemical activity of certain metallic carbides is well patent gra
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
