Sugar, The Andrlik Urea Method of Polarization for- Cane pounds. By G. OTTO GAEBEL. Archi-; der Pharmazie, Products. ~ ~ ' I L L I A ME. CROSS AND IT'. G. ThGG.4RT. I?$Vol. zjo, 1912, No. I , pp. 72-80. tevnational Sugar Journal, Vol. 13, 1911, S o . 156, pp. Paints, Gas Worksand Preservatives. H . S. B. LITTLE. 662-668. Progressize Age, Vo1. 30, 1912, KO.2 , pp. 74-77. Paper, The Ash Content of-. By HANS ~'I'REDE. P U ~ ~ F Sugar, Y, The Unification of ReducingMethod. A Correction. Vol. 6, 1912, No. 7, pp. 13-14. By PERCYH. ~VALKER.Journal of the Americau Chemical By H. LOESSER. Chemische Patents, TheqHistory of-. Society, Vol. 34, 1912, Xo. 2 , pp. 202-209. IYovitaeten, Vol. 7 , 1911, No. 1 2 , pp. 216-22j. Tannery, Notes on the Determination of Acids in Chestnut Wood Photometry of Large Light Sources. By G. H. STICKNEEAND and- Liquors. By GEORGEA. KERR A N D W. F. I~-ILSON. S. I,,E. ROSE. Transactions of the Illuminating Engineering Journal of the American Leather Chemists' Sssociatioii , Yol. Society, Vol. 6, 1911, S o . 7 , pp. 641-670. 7 , 1912, KO.2 , pp. 77-87. Rubber, Coagulating- by Carbonic Acid. By l \ r ~ PAHL. ~ ~ ~ ~ ~ t Timber, The Antiseptic Effect of Creosote Oil and Other Oils India Rubber TVorld, Vol. 45, 1 9 1 2 , S o . j,pp. 211--212. By J O H NMORRIS WEISS. ]ourrzal Used for Preserving-. Rubber, The Influence of Mineral Ingredients o n the Properties of the Society of Chemical Industry, Vol. 3 0 , 1911, No. 3 3 , pp. Of-. By CLAYTON BEADLEA N D H E N R YP. STEVENS. Jour1348-1353. nal of the Society o f Chemical Industrj', 5'01. 30, 1911, S o . 24, Vacuum Pans, Calculations of-. By B. VIOLA. .1[etallur!iical pp. 1421-1425. a n d C'hcm cal Eng.'veering, Vol. S , 1912, S o . I , pp. 31-36.. Sewage, Separation of Solids from Liquids with Special Reference toPurification. By GILBERT J . FOWLER. Journal of Vanadium, Pure-. By OTTO RUFF A N D WALTERMARTIS. the Society o j Chemical Indust??', Vol. 3 0 , 1911, No. 23, pp. Zeitsciwijt jzicr azgezandte Chemic, 5'01. 2 3 , 1912, KO. 2 , pp. 1313-1348. 49-56. Soils, Philippine- and some of the Factors which Influence Water-Power, Pri!iciples of- Development. By I\..J . XCGEE. them. By ALVIS J. Cox. PhiliPPine Journal of Science, S c i e u c e , Yol. S S X I V , 1911, S o . 8 8 5 , pp. 813-825. Tol. S U , 1911, S o . 4 , pp. 279-330. Soil, Treatment of- with a Strong Electric Current (Direct). Wool, Studies on Strength and Elasticity of the- Fibre. I. The Probable Error of the Mean. By J. A . HILL. T z r i i t y By J . KOESIG,J. HASENBAEUMER A N D C. HASSLER.Zeitfirst Autaual R e p o r t 1 1 ~ ~ ~ u m : ' ~.lgr.culturnl zg Expcri meat schrijt fiir nizgeuandte Chemze, Vol. 24, 1911, S o . 49, StatiOll, 1910-1911, pp. 1-139. pp. 2341-2348.
RECENT INVENTIONS Reported by C. L. Parker, Solicitor of Chemical Patents. McGill Building. IVashington, D. C.
PROCESS FOR THE ELECTROLYTIC DEPOSIT OF METALS.
U. S. Patent No. 1,003,799,to Armin Rodeck, of Milan, Italy. This invention is a process especially adapted for the separation of metals electrolytically by the aid of mechanism. There is inserted between an ordinary fixed anode and a niovable cathode a mechanically moved transferring mechanism of suitable material. which is either naturally conducting or is made conducting a t the operative surface. This mechanism usually receives a porous non-conducting coating of material which serves as a carrier of the electrolyte and adapts itself in its outer form to the shape of the object t o be coated. The electric current passes in this process from the anode through the porous material to the transferring mechanism, and from this latter to the cathode, where naturally the quantity of metal depositing upon the transferring mechanism from the anode will a t any given moment exactly equal the quantity proceeding from this mechanism to the cathode, because the current strength is throughout the same. I t is, therefore, not necessary to make the anode itself of that shape which corrcsponds t o the profile of the article to be coated, b u t t h a t form of anode n-hich can be obtained most cheaply in commerce as,for instance, bars, rods, sheets, or even scraps can be used by providing them with suitable current connections and pressing them against the transferring mechanism. I t , of course, is true, by reason of the fact that the electric current mus. pass twice through the coating of material which really constitutes secondary electrodes and also acts as a carrier of the electrolyte, that the resistance to transfer is increased. But, on the other hand, in consequence of the wide range of choice of the shape and material of the transferring mechanism, one can so select said mechanism that quite a thin coating, even on a somewhat rough surface of the objcct to be coated, will effect a perfect deposit; and, therefore, the process can be easily carried on
with the ordinary current tension usually employed ini,tlie electro-depositing operations.
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