Skin diseases, 27, 38, 47, 52, 55, 56, 58, 62, 64, 65, 71, 96, 102, 107, 118, 143, 144, 154-156, 171, 173, 185-189, 203, 208, 209, 265 Smelting processes, 89, 94, =119= (i), 143, 144, 182, =288-290= (iii), 299, 323-325, 326 Smokeless powder, 49, 211 Soda, 2, =14= (i), 17-20, 55, 65, 92, 95, =258= (iii) electrolytic, 20 waste, 18, 65, 258 Sodium bichromate. See Chromate sulphate and sulphide, =14= (i), 17, 19-22, 22, 112, =258= (iii), 286 Soldering, 145, 316, 329 Solvay method. See Ammonia soda Solvent naphtha, 99-102, 106, =207= (ii), 330 Spirit, denaturing of, 99, 100, 210, 216 Substitutes for poisonous materials, =243= (iii) Suction gas, =82= (i), 83, 87-89, =276-278= (iii) Sulpho-cyanide compounds, 75, 90, 93 Sulphonal, 22, =259= (iii) Sulphur, 31, 52, =65= (i), 65, 68, 74, 93, 122, 288 Sulphur dioxide, =5= (i), 9, 13, 14, 19, 21, 23, 31, 54, 63, 65, 119, 120, 122-125, 148, 154, =171= (ii), =257= (iii), 259, 267, 279, 288, 323, 326, 327, 333 dyes, 112 soap, 294 Sulphuretted hydrogen, 8, 12, 13, 16, 18, 21, 50, 52-54, =65= (i), 66, 67, 74, 79, 90-93, 95, 96, 101, 102, 103, 106, 107, 112, 114, 175, =192= (ii), 193, 258, 271, 279, 280, 285, 286, 290 Sulphuric acid, =5= (i), 9, 14, 18-20, 23, 33, 37-41, 46, 47, 49, 50, 53, 54, 60, 64, 65, 67, 92, 93, 108, 112, 119, 145, 151, 154, 156, =171= (ii), =256-257= (iii), 261, 279, 286 arsenic free, 9 Superphosphate industry, 38, =53= (i), 54, 55, 92, =176= (ii), =261-265= (iii) Swedish matches, 50, 52, 55, 58, 265 Tanning, 55, 56, 58, 66, 67, 94, 143, 144, 153, 265, 329 Tar, 71, 77-80, =96-107= (i), 156, 275, =280-285= (iii) colours. See Aniline colours derivatives, 40, 46, =96-107= (i), =204-208= (ii), 210, =213-215= (iii) Teak wood, 154 Textile industry, 134, =156= (i), =336= (iii) Thermometers, manufacture of, 141, 328 Tiles, =137-138= (i). See also Pottery Tin, 44, 138 Tobacco industry, =154= (i), =335= (iii) Toluene, 32, 35, 96, 108, 112, 204, =206= (ii), 285 Toluidine, 109, 111, 118, 214, 285, 287 Treatment of poisoning, =163-127= (ii) Turpentine, 69, 104, =215= (ii), 331 Type casting, 138, 139 Ultramarine, 19, 22, 259 Ursol, 118 Varnish, 58, 61, 101, 215, 330-332, 337 Vaseline, 60 Vegetable food stuffs, preparation of, =154= (i), =332-336= (iii) Ventilation, =243-255= (iii) artificial, 244-247 localised, 248-250 natural, 243 Vermilion, 57 Vulcanising, 31, =68= (i), 68-70, =272-274= (iii) Washing accommodation, =237= (iii) Waste sulphuric acid, 43, 53 water, 66 Water gas, 82, 84, 87, 88 gilding, 141, 142, 327 Weldon process, 23, 29, 58, 59 White lead, 55, =131-134= (i), =310-313= (iii) Wood (poisonous), =154-156= (i), =216= (ii), =335= (iii) Workmen’s baths, 237, 292 clothing, 229 insurance, 219 welfare, 237-242