Oils, 196-217, 306 Oleomargarin, 207-212, 307 Orange blossoms, 99, 100 Osmium, 28 Ostwald, 29, 55 Oxy-hydrogen blowpipe, 246 Paper, 111, 132 Parker process, 273 Peanut oil, 206, 211, 214, 306 Perfumery, Art of, 103-108 Perfumes, synthetic, 93-109, 302 Perkin, W.H., 148 Perkin, Sir William, 72, 80, 102 Pharmaceutical chemistry, 6, 85-88 Phenol, 18, 64, 84, 101, 102, 137 Phonograph records, 84, 141 Phosphates, 56-59 Phosgene, 224, 225 Photographic developers, 88 Picric acid, 18, 84, 85, 226 Platinum, 28, 278, 280, 284, 286 Plastics, synthetic, 128-143 Pneumatic tires, 162 Poisonous gases in warfare, 218-235, 307 Potash, 37, 45-56, 300 Priestley, 150, 160 Purple, royal, 75, 79 Pyralin, 132, 133 Pyrophoric alloys, 290 Pyroxylin, 17, 127, 125, 130 Radium, 291, 295 Rare earths, 286-288, 308 Redmanol, 140 Remsen, Ira, 178 Refractories, 251-252 Resins, synthetic, 135-143 Rose perfume, 93, 96, 97, 99, 105 Rubber, natural, 155-161, 304 synthetic, 136, 145-163, 304 Rumford, Count, 160 Rust, protection from, 262-275 Saccharin, 178, 179 Salicylic acid, 88, 101 Saltpeter, Chilean, 22, 30, 36, 42 Schoop process, 272 Serpek process, 31 Silicon, 249, 253 Smell, sense of, 97, 98, 103, 109 Smith, Provost, 237, 245, 307 Smokeless powder, 15 Sodium, 148, 238, 247 Soil chemistry, 38, 39 Soy bean, 142, 211, 217, 306 Starch, 137, 184, 189, 190 Stassfort salts, 47, 49, 55 Stellites, 280, 308 Sugar, 164-180, 304 Sulfuric acid, 57 Tantalum, 282 Terpenes, 100, 154 Textile industry, 5, 112, 121, 300 Thermit, 256 Thermodynamics, Second law of, 145 Three periods of progress, 3 Tin plating, 271 Tilden, 146, 298 Titanium, 278, 308 TNT, 19, 21, 84, 299 Trinitrotoluol, 19, 21, 84, 299 Tropics, value of, 96, 156, 165, 196, 206, 213, 216 Tungsten, 257, 277, 281, 308 Uranium, 28 Vanadium, 277, 280, 308 Vanillin, 103 Violet perfume, 100 Viscose, 116 Vitamines, 211 Vulcanization, 161 Welding, 256 Welsbach burner, 287-289, 308 Wheat problem, 43, 299 Wood, distillation of, 126, 127 Wood pulp, 112, 120, 303 Ypres, Use of gases at, 221 Zinc plating, 271 _Once a Slosson Reader_ _Always a Slosson Fan_ JUST PUBLISHED CHATS ON SCIENCE By E.E. SLOSSON Author of "Creative Chemistry," etc. Dr. Slosson is nothing short of a prodigy. He is a triple-starred scientist man who can bring down the highest flying scientific fact and tame it so that any of us can live with it and sometimes even love it. He can make a fairy tale out of coal-tar dyes and a laboratory into a joyful playhouse while it continues functioning gloriously as a laboratory. But to readers of "Creative Chemistry" it is wasting time to talk about Dr. Slosson's style.