---- action of, 233, 242, 245 ---- artificial, 263 ---- bacteria in, 239 ---- damage, 236 ---- fermentations of, 238 ---- gases from, 242, 248 ---- glucoses in, 261 ---- “pinholey,” 238 ---- putrid “turning” of, 237 ---- sweet bran, 235 Dressing hides, 19 Drop culture, 87 Dung analyses, 26, 150, 152, 153 ---- mineral matter of, 153 Eberle, G., 13 Eberle’s patent, 221 Effront, Dr., 11 Eitner, 242, 244 Electrometric apparatus, 76 ---- method, 33, 49 Emulsin, 132 Enzymatic bates, 197 Enzymes, action of, 145 ---- ---- of serum on, 144 ---- ---- on skin, 140 ---- calcium in, 136 ---- defined, 127 ---- diastatic, 235 ---- from bacteria, 131 ---- hydrolysing, 132 ---- in dog’s dung, 137 ---- lipolytic, 145 ---- manganese in, 136 ---- preparation of, 134, 164 ---- proteolytic, 145 Erepsin, 133, 142 Erodin, 179 Erodin, stock liquor, 182 Esco, 192 Esters, synthesis of, 127 Ethyl butyrate, 165 Ethylamine butyrate, 42 ---- lactate, 42 ---- propionate, 42 Fahrion, Dr., 52 Falling, 67 ---- apparatus for measuring degree of, 82 Fat in puer, 25, 30 ---- in skins, 16 Feeding of dogs, 28, 95 Fermentation in the leather industry, 147 ---- nitrogen from, 279 Ferments, digestive, 148 ---- gall, 224 ---- hydrolysing, 132 ---- imino-lytic, 133 ---- oxidizing, 133 ---- oxylytic, 133 Flagellæ, staining of, 94 “Flaked” grain, 149 Formic Acid, 9 Fractionating acids, 250 Frankland and Frew, 249 Gall ferments, 224 Gamgee, 281 Gas analysis, 247 Gases from drench, 242, 248 ---- from pure cultures, 275 ---- intestinal, 281 Gayon, 280 Gelatin, 56 ---- density of, 63 ---- glucose, 267 ---- molecular weight of, 56 ---- peptonized, 168 Glucose bate, 179 ---- gelatin, 267 Glucoses in drench, 261 Glycerin, 141 Goat skins, 183 ---- ---- bating of, 231 Guano, analysis of, 150 Golding, J., 175 “Grains,” analysis of, 7 Harness backs, 17 Hauff, J., 236 Hen dung, analysis of, 150 Hexoses, 125 Hide-powder, density of, 66 Hides, bating of, 17 Houston, Dr., 93, 94, 97 Hydrogen from drench, 239 Hydrogen-ion concentration, 74, 79 Hydrochloric acid, use in deliming, 11 Hydrolysis, 128 ---- velocity of, 130 Hydrolysing enzymes, 132 Immendorf, 280 Imino-lactic ferments, 133 Indol, 95, 106 Infusoria, 123 Intestinal gases, 281 ---- juice, 225, 228 Inulase, 132 Jean, F., 41 Jones, Arnold Seymour, 75, 133 Kaolin, 176 Kathreiner, F., 46, 236 ---- bate trials by, 183, 184 Koch’s Jahresbericht, 125 Körner, Dr. Th., 67, 167