Rolling leather, 51 Round of pits, 19, 46 Rounding pelt, 22 Salted food proteins, 275 hides, 12 Samming, 50 Satin leather, 76 Schultz chrome tannage, 128 Scouring, 51 Scudding, 22 Scutch, 271 Sealskins, 106 Seasoning, 97 Semi-chrome, 191 Sharp limes, 19 Shaving, 51 Shearlings, 114 Shedwork on gelatine, 257 on leather, 50 Sheepskins, 110, 163, 174, 181 Short processes, 47, 194 Silk, 280 Skins, 92 Skivers, 116 Sludge from lime pits, 270 Smoked foods, 275 Soaking hides, 16 Soda, 18, 20 Sodium sulphide, 18, 20 Sole leather, 55 Sour tan liquors, 44 Split fleshes, 76, 181 hides, 86 Splitting, 52 Staking, 155 Stocks, 18 Stoning, 51 Stove drying, 105, 109, 125 Strap butts, 65 Striking leather, 51 Stuffing leather, 49, 53 Substance, interfibrillar, 24 Sulphide of arsenic, 20 soda, 18, 20 Sulphurous acid, 227, 243 Sumach, 31 use in dyeing, 104, 117 use in finishing, 62, 84 use in tanning, 102 Suspenders, 46 Sweating, 113 Swelling of gelatine, 201-220 of pelt, 19 Syntans, 188 Synthetic tanning materials, 187 Tannage, alum, 174 bag, 103 bottle, 103 chrome, 127, 139 combination, 191 drum, 47 fat, 178 formalin, 185 oil, 181 with synthetic materials, 187 of bag leather, 86 of bridle leather, 71 of belting leather, 65 of harness leather, 71 of bookbinding leather, 99, 110, 120 of morocco leather, 99, 106, 110, 120 of picking band leather, 90 of sole leather, 55 of upper leather, 76 of roller leather, 118 Tannage, chrome, of calf, 156 of goat and sheep, 163 of hides, 170 Tannage, vegetable, heavy hides, 55-90 skins, 92-123 Tanning, theory of, 41 chrome, theory of, 129 Tannins, catechol, 32 classification of, 28 properties of, 27 pyrogallol, 28 Three-paddle system of tanning skins, 103 Three-pit system of liming, 19 Tissue, adipose, 271 Two-bath chrome tannage, 142 Udders, 220 Unhairing, 22, 23 Upper leather, 76, 115, 120, 123 Vacuum on condenser, 250 pan, 248 Valency rule, 131, 236 Valonia, 30 Vatting sole leather, 62 Vegetable tannage, 41 of hides, 55-90 skins, 92-123 tanning materials, 28 Velocity effect on heat transference, 253 War, effect on methods, 194, 265 on supplies, 11-13, 33, 277 Warble fly, 10 Waste leather, 270 Wattle or mimosa bark, 33 Waxed leathers, 76-86 Weather drying, 49 Willow bark, 32 calf, 156 Wood, J. T., action of puer, 94 Wool, 110, 269 Yaryan evaporator, 249 Zones of compressed water, 202-205 End of the Project Gutenberg EBook of Animal Proteins, by Hugh Garner Bennett