. Journal. per cent, of lead nitrate, andnitrites must be present in sufficient quantity, but theseadditions may be dispensed with if a small current densityis used at the cathode. Lime or calcium carbonate maybe used instead of caustic alkali as the absorbent, and thecalcium nitrite or nitrate is afterwards treated with a saltof an alkali metal. The nitrite or nitrate of the alkalimetal is then treated electrolytically to obtain purecaustic alkali.—B. N. (B. (—ELECTRO-METALLURGY. Aluminium Alloys; Thermo-Electricity of ?——. H. Pecheux. Comptes rend., 1904, 139, 1202— author has determ
. Journal. per cent, of lead nitrate, andnitrites must be present in sufficient quantity, but theseadditions may be dispensed with if a small current densityis used at the cathode. Lime or calcium carbonate maybe used instead of caustic alkali as the absorbent, and thecalcium nitrite or nitrate is afterwards treated with a saltof an alkali metal. The nitrite or nitrate of the alkalimetal is then treated electrolytically to obtain purecaustic alkali.—B. N. (B. (—ELECTRO-METALLURGY. Aluminium Alloys; Thermo-Electricity of ?——. H. Pecheux. Comptes rend., 1904, 139, 1202— author has determined the of the M JOURNAL OF 1HK sociKlY OF CHEMICAL INDUSTRY. [Jan. at, 1905. various aluminium alloy* prepared by him as compared single and alloyed, were employed oast into rods, withoutwith copper the eold junction being always at 17-5°C., any mechanical treatment rhe following are the resultsthe hot junction at 100°, I- . md 380 C. All the metal-. expressed in microvolts:—. M :— 66 % Mg. Al. 73% 100 .. .. JO* .. •? •• 1 155-19151-40 105-98 [249-S1 121-12 128-69 272-52 280-09 340-65 136-26249-8J458-40 162-75 ::. 181-68 423-92531-30 iMoxy-ALrMLXirx :— 1 Sb. SbAl38. SbAl,0. ShAUo 3bAl35- Al 100 .. ..380° .. 2920-505459-657217-96 45-42 10S-98 151-40 64-35 87-05151-40 177-01211-96 249-81 98-41211-96317-94 162-75359-08404-90 Zixc-Airvixior :— Zn. Zn,Al. ZnAl. I SnAlj. ZnAl,. ZnAl,. ZnAl8. ZnAl10. ZnAl is-! Al. 100380° 18-9226-9541-64 40-2194-63 64-35 162-75 113-55 166-54 151-401540-65 314-16621-20 460-31 161-47348-22 523-34 174-12404-92679-96 181-68189-64719-95 166-54 177-90 0 «2-00 595-92 443-12 T. D. Copper Odvanoplastic Process without Stirring andHeating. S. von Maximowitsch. Elektrochem. Zeits.;L904, 11. 163 166. Chem. Centr., 1904, 2. author, in order in avoid heating or stirring theelectrolyte, arranges the electrodes horizontally, theanode above the cathode, so that the concentrated
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