. Journal . constituting the oven proper, of refractory space between the two walls is filled with non-con-ducting and slightly compressible material, such as irondross or clinkers mixc<l with a little sandy clay. Thearrangement may be extended to a whole battery ofkilns.—H. H. .S. [Incandescence] Heating by radiation ; lie/ractori/ matitlcs or Ike lite /or . M. Delage, Paris. Eug. Pat. 28,407. Dec. 24, 1907. Under Int. Conv., Feb. 27. MANTLE k-nitted from asbestos thread is soaked iu asolution of the soluble .salts of metals having refractoryoxides, dried, and stretched
. Journal . constituting the oven proper, of refractory space between the two walls is filled with non-con-ducting and slightly compressible material, such as irondross or clinkers mixc<l with a little sandy clay. Thearrangement may be extended to a whole battery ofkilns.—H. H. .S. [Incandescence] Heating by radiation ; lie/ractori/ matitlcs or Ike lite /or . M. Delage, Paris. Eug. Pat. 28,407. Dec. 24, 1907. Under Int. Conv., Feb. 27. MANTLE k-nitted from asbestos thread is soaked iu asolution of the soluble .salts of metals having refractoryoxides, dried, and stretched upon a mould to give itthe desired form. This is done in order to harden andstiffen the mantle. It is then calcined in a gas flameand a thick layer of cerium oxide is deposited upon itby soaking it in a strong solution of a cerium salt, dryingand subsequently calcining it.—W. H. C. Filtering apparatus ; Rotary ——. A. J. Arbuekle andA. Osborne, Johannesburg, Transvaal. Eng. Pat20,400, Sept. 28, A CYUNDKiCAL frame, 1, having a solid flange, 2, on itsouter edge and a hollow flange, 3, on its inner edge, is. 10. There are four arms for each sectionof the frame ; one for filtering by suction, one for dryingI by vacuum, and two for back pressure. The hollow armscomnnniicate at their outer ends with the fdtering chambersI by the hollow fiange, 3, which is also divided into com-partments to correspond with the filtering chambers;and at their inner ends with hollow pierced inthe hub. The passages, 18, are for suction and com-! municate with the chamber, 47 which is connected to aJ suction producing device. The passages, 19, communicate? with the chamber, ol, connected to a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
