power and water for batteries, [73], [74];

ore feeders, [74], [75];

stamp mills, [76-78];

screens, [78];

blanket tables, [79];

treatment of pyritous ores, [80];

mode of saving the gold, [81];

treatment of ferruginous ores, [82];

cleaning and scaling plates, [83];

retorting amalgam, [84-86];