carbide, 87, 92. Extraction of, 78, 82. Beatson process (tin-plate), 320. Beketoff process (aluminium), 103. Berg process (aluminium), 129. Bessemer process (copper), 174. (iron), 380. Refining, Asbestos, 17. Ashcroft process (zinc), 307. Augustin process (silver), 239. (antimony), 348. (chromium), 366. (lead), 339. (magnesium), 27, 28. (silver), 253. (sodium), 57, 60, 64. (sodium alloys), 72. (zinc), 299, 312. |