← Table of contents
The Principles of Leather Manufacture

INDEX.

Reading edition

Abies, 246

Acacia, 288

— arabica, 165

Acetic acid, 154, 221, 410

Acid, acetic, 154, 221, 410

— amido-acetic, 61

— — -caproic, 61

— — -propionic, 61

— — -succinic, 61

— arsenious, 26

— aspartic, 61

— benzoic, 29

— boric, 155, 162, 221, 229

— butyric, 61

— carbolic, 26, 295

— carbonic, 99, 105, 161

— chromic, 200

— cresotinic, 29, 162

— digallic, 295

— ellagic, 231, 296

— ellagitannic, 231, 297

— formic, 154, 159, 410

— gallotannic, 295

— hydrochloric, 154, 157

— lactic, 154, 158, 221

— linolenic, 355

— oleic, 240, 354, 360

— oxalic, 155, 221

— oxynaphthoic, 30, 163

— perchromic, 200

— protocatechuic, 295

— pyroligneous, 154

— salicylic, 28, 295

— stearic, 351

— sulphuric, 114, 154, 157, 410

— sulphurous, 23, 114, 338

— xanthoproteic, 67

Acids, action on hide, 84

— amido-, 61, 66

— in tanning liquors, 20

— mineral, 23

— use in softening, 114

Acrilene bating acid, 163

Adipose tissue, 53

Æthalium septicum, 10

African oak, 257

Ageing, 188

Ailantus, 272

Air, capacity for moisture, 426

— cost of heating, 428

— -filters, 439

— -passages, 437

— weight of, 428

Alanine, 61

Albumin of hide, 65

Albumins, 56, 66

Alcohol, action on hide, 83

Alcoholic fermentation, 13, 16

Alder, 250

Allen, 366

Aleppo pine, 248

Algarobilla, 286, 293

Alizarine colours, 403

Alkalies, action on gelatine, 89

— — on hide, 84

Alkaline carbonates, 138

Alnus, 250

Alsop, 313

Alum, 159, 339, 185

Alumed leathers, 2, 4, 9

— — dyeing, 402

Alumina, 185

— in water, 103

— soap, 352

Aluminium, 185

Amido-acetic acid, 61

— -acids, 61, 66

— -caproic acid, 61

— -propionic acid, 61

— -succinic acid, 61

Amines, 173

Amœba, 10

Ammonium chloride, 157, 159

— sulphate, 159, 184

Analysis of tanning materials, 300, 475, 482

Anacardiaceæ, 269

Andreasch, 272

Angicabark, 293

Anhydrides of tannins, 297

Aniline dyes, 394

Anion, 80

Anogeissus, 293

Anticalcium, 29, 157

Antiseptics, 21

A.O.A.C. method, 300, 312, 482

Apocynaceæ, 279

Apples of Sodom, 261

Arata, 269

Arbutus, 279

Archbutt and Deeley, 95

Arctostaphylos, 279

Arsenic, 26

— cures, 39, 42

— -limes, 194

— sulphide, 139, 142

Arsenious acid, 26

Aspartic acid, 61

Aspidospermum, 279

Association of Official Agric. Chem., 300, 312, 482

Atmospheric pressure, 422

Attractions of molecules, 74

Avidity of acids, 81

Azo-colours, 399

Bablah, 289

Babool, 165, 228, 288

Babul—see Babool

Bacillus erodiens, 175

Bacteria, 14, 15

— aerobic and anaerobic, 471

Bacterial filters, 469, 472

— products, 18, 19

Bacterium furfuris, 166

Badamier bark, 282

Bag-tannage, 235

Bakau bark, 283

Balance, analytical, 310

Balaustines, 285

Bali-babilan, 288

Balsamocarpon, 286

Band-knife splitting machine, 384, 387

Banksia, 268

Barbed wire scratches, 43

Barium chloride, 391

— sulphydrate, 142

Bark, 243, 244

Bark mills, 316, 452

Barytes, 390

Basic chrome liquors, 211, 241

— salts, 187, 199

Bast, 243

Bastin, 244

Bate-shavings, 463

— -stains, 176

Bating, 8, 19, 152, 170, 233

— effect of water on, 107

Baudouin’s test, 365

Bearberry, 279

Becker, 172, 174

Bedda nuts, 282

Beeswax, 371

Beetle attacking hides, 42

“Bell”-mills, 317

Belting, 450

Benzene, 295

Benzoic acid, 29

Bernardin, 242

Betel nut, 248

Betula, 250

Betulaceæ, 250

Bichromate of potash, 201

Biernacki, 21

Bilberry, 280

Birch, 250

— -tar oil, 32

Bistort, 266

Bisulphites, 25, 338

Biuret reaction, 67

Black-dyeing, 398, 399, 413

Bleunard, 57

Blood-albumen, 337

Bloom, 231, 297

Bluebacking, 217

Boarding, 233

Boiler incrustations, 99, 101

Boiling point, 75, 421

Bone-oil, 62

Book-binding leathers, 234

Boral, 155

Borax, 156, 216

Borgman, 181

Boric or boracic acid, 156

Bottle-tannage, 235

Bourgois, 57

Brabium, 268

Bran-drench, 166, 195

Brands, 43

Brazil-wood, 287, 413

Breaking stress of leathers, 451

Breed, effect on skin, 45

Brick pits, 455

Brining hides, 38

Briquettes of tan, 464

Bronzing, 395, 404

Brunton, 61

Brusca, 272, 280

Brushing machine, 226

Buff-leather, 378

“Buffalo” method, 129

Burns and Hull, 163

Butea, 285

Butyric acid, 61

Byrsonima, 269

C. T. bate, 163

Calcium sulphydrate, 140

Calculation of tannin analysis, 314

Calf-kid, 189

Calorie, 422

Cambium, 243

Camphor, 31

Canaigre, 264

— root, extraction, 348

Carbolic acid, 26, 295

Carbolineum, 28

Carbon disulphide, 30

Carbonic acid, 99, 105, 161

Carboxyl, 295

Carr’s disintegrator, 319

Carter’s disintegrator, 319

Cascalote, 286

Casein, 68

Cassia, 235, 287, 299

Castanea, 251

Casuarina, 249

Catechins, 298

Catechol, 295

— tannages, 234, 295

Catechu, 277, 289

Caustic alkalies, 22

— soda, 114, 136

Cavallin, 202

Cavallo, 285

Cebil, 293

Cells, 10

Cellulose, 12

Centigrade thermometer, 481

Centrifugal pumps, 458

Ceriops, 283

Chain-conveyors, 325, 453

Chamois leather, 9, 378

— — dyeing, 496

Chamoising, 369, 378

Chemical deliming, 153

Chenailier evaporator, 424

Chestnut, 251

— -oak, 254, 263

— -wood extract, 222, 231

Chlorides in water, 104

Chondrin, 63

Chromalin, 212

Chrome-alum, 201

— -blacks, 402

— combination tannages, 215

— -iron ore, 200

— leather, 4, 9

— — dyes for, 494

— tannages, 200

Chromic acid, 200

Chromium, 185, 200

Churco bark, 280

Clark, 95

Cleistanthus, 293

Coal-tar or C. T. bate, 29, 163

— — dyes, 394

Coccoloba, 267

Cocos, 249

Cockle, 45

Cæsalpinia, 285

Coffee-mill, 317

Cohn’s solution, 177

Colloids, 77, 396

Colour, theory of, 416

— -measurement, 479

Colouring matters, 299

Colours, primary, 416

— secondary, 416

— tertiary, 416

Combination-tannages, 4, 236

Combretaceæ, 280, 293

Concentration of extracts, 339

Concrete pits, 455

Cone-mill, 317

Coniferæ, 246

Connective tissue, 50

Conocarpus, 283

Contact-beds, 472

Conveyors, 325, 327, 453

Copper in water, 104

— sulphate, 26

Coriariaceæ, 277

Coriaria, 272, 277

Corium, 46

Coriin, 64

Cork, 244

Cork-cambium, 243

Cork oak, 257

Corrosive sublimate, 25

Cortegia rossa, 248

Couperus, 277

Creasote, 28

Creolin, 28

Cresotinic acid, 29, 162

Crown leather, 381

Crystallisation, 77

Crystalloids, 77

Cupuliferæ, 251

Curtidor bark, 280

Curupy bark, 293

Cutch, 289

Cuticle, 46

Cutis, 46

Cylinder-oils, 100

Danish glove-leather, 236, 238

Daphne, 267

Daphnoidæ, 267

Decoloration of extracts, 337

Degrees of hardness, 94, 105

Dégras, 368, 380

“Dégras-former,” 370, 385

Deliming by acids, 154

— by washing, 154, 160

De Lof, 242

Denaturised salt, 23

Dennis, 163, 211

Depickling, 91

Depilation, 7, 54, 119

Depletion by puers and bates, 91

Derma, 46

Dermestes vulpinus, 42

“Devil disintegrator,” 318

Dextrose, 16

Diazo-compounds, 399

Digallic acid, 295

Diffusion, 78

Dippel’s oil, 62

Disc-mill, 317

Disinfectants, 21, 474

Disintegrators, 318

Dissociation, 85

Distilled grease, 359

Divi-divi, 285

Djaft, 263

Docks, 264

Dog-dung, 174, 179, 181

“Dogskin,” 197

Dongola, 197

— imitations, 241

— leather, 236, 239

Doornbosch, 293

Drench fermentation, 19

Drenching, 8, 20, 152, 166, 195, 233

Drepanocarpus, 285

Dressing-leather tannage, 232

— leathers, 8

Driers for oils, 363

Drum-stuffing, 388

Drumming, 234

Drums, 117

Dry hides, 110

Drying, effect on skin, 112

— hides, 41

— leather, 424

— oven, 308

— rooms, 431

— of sole leather, 232

Dry-salted hides, 110

— -salting, 38

Dschigh dschighe, 286

Dubbing, 386

Dust-prevention, 325

Dye-testing, 419

Dyeing alumed leathers, 402

— chrome leather, 403, 493

— Continental method, 408

— defects in, 404

— in drum, 408

— in paddle, 407

— in tray, 406, 408

— kid, 196

— oil-leathers, 404

— selection of goods, 409

— theories of, 396

Dyes, acid, 395, 412

— basic, 395, 411

— lists of, for leather, 486, et seq.

— list of manufacturers, 485

— mixtures for leather, 491

— -woods, 412

Earp, W. R., 143

East India skins, 235, 238, 241

Eberle, 212

Edge-stones, 316

Effluents, 467

Egg-albumin, 67

— -yolk, 68, 393

Eglinton Tanning Co., 203

Egyptian leathers, 2

Einbrennen, 390

Eitner, 105, 109, 112, 114, 131, 168, 205, 212, 216, 252, 366, 382, 392

Elandsboschjes, 293

Elastic fibres, 53, 69

Electric driving, 449

Electrolytes, 79

Electrolytic dissociation, 79

Elephantorrhiza, 293

Ellagic acid, 231, 297

Ellagitannic acid, 231, 297

Emulsifying, 240

Enzymes, 15, 16, 171, 173

Epidermis, 46, 68

Epithelium, 46

— -cells, 13

Erector pili, 50

Ericaceæ, 279

“Erodin,” 174

Espinillo, 293

Essential oils, 31

Eucalyptus, 284

Eudermin, 27

Euphorbiaceæ, 293

Evaporation, 421

— for analysis, 307

— in vacuo, 423

Evaporator, Yaryan, 339

Evergreen oak, 256

Excise-duties on leather, 3

Extraction, optimum temperature, 344

Extracts, liquid, analysis, 301, 305, 475, 476, 477

— solid, analysis, 301, 305, 476, 477

— use of, 342

Fading of colours, 405

Fahrion, 61

Faller-stocks, 116

Fan, Blackman, 428, 430, 434

— Capel, 437

— centrifugal, 437, 439

— drying by, 433

— screw, 430, 434, 437

Fat, 461, 462

— -cells, 52

— -glands, 48

— -liquoring, 217, 237, 239, 393

— -liquors, 100

— -tanned leathers, 1, 4

Fats and oils, 350

— solvents of, 353

Fatty acids, liquid, 354

— — saturated, 354

— — unsaturated, 355

Fellmongering, 34

Fermentation, 13, 15

Ferric chloride, 86

— salts, 198

Ferrocyanides, 339

Ferrous salts, 198

Fibre-bundles, 50

Fibres, elastic, 53

Fibrils, 50

Filao bark, 249

Filter method, 311, 478

Filtration for analysis, 307, 477, 483

— of sludge, 470

“Fine-hairing,” 180

Finishes for leather, 401

Fire insurance, 325

Fish-tallow, 368

Flaying, 42

Fleshing, 8, 146

— machines, 147

Fleshings, 461

Flückiger and Hanbury, 277

Fluorides, 26

“Foots,” 356

Formaldehyde, 30, 380

Formalin, 31, 380

Formic acid, 154, 159, 410

Frizing, 378

Fuchsia, 284

Fuchsine, 395

Fungi, 15

Fusanus, 267

Gall oak, 261

Gallotannic acid, 295

Galls, 261, 280

Gambier, 222, 231, 277

— extraction, 349

Garcinia, 293

Gas-engine, 449

— -lime, 141

Gaseous state of matter, 74

Gaultheria, 251, 373

Gelatin, 56, 58

— action of bacteria on, 61

— analyses, 57

— chemical constitution, 57

— decompositions, 60

— determination, 59, 60

— properties of, 58

— reactions, 62

— swelling of, 82

Glaeser mill, 318

Glassy layer, 50, 398

Glazing, 418

Globulin, 67

Globig, 17

Glove-kid, 194

Glucose, 13, 16, 177, 390

Glue, 461

Gluestuff, 461

Glutin, 56, 58

Glycerin, 351

“Golden spoon,” 269

— tan bark, 248

Gonagra, 264

Grain, 233

— “drawn,” 228

— -layer, 51

— microscopic examination, 52, 55

— pattern of, 52

Grains of various skins, 52

Granataceæ, 285

Grease, recovery, 462

— refining, 463

Greases, 357

“Green leather,” 197, 239

Grevillia, 268

Griffith, 231

Grinding machinery, 452

— samples, 303, 476

Grounding, 189

Guano, 177

Gum tree, 284

Gumming, 20

Guttiferæ, 293

Gunnera, 284

Gunneraceæ, 284

Glycocine, 61

Glycocoll, 61

Hæmatoxylon, 286

Hair, 68, 460

— -bulb, 49

— -cuticle, 48, 49

— -muscle, 50

— -papilla, 49

— structure and growth, 47

Hand-stuffing, 386

Handlers, 221

Hardness determination, 94

— effect on dyeing, 100

— effects on tanning, 98, 105

— of water, 93

Harrison, 273, 473

Hauff, 157, 162, 163

Heal, 203

Heat, capacity for, 422

— consumed in evaporation, 423, 428

— — in melting ice, 423

— given by pipes, 432

— loss through walls, 431

— measure of quantity, 422

— of combustion of coal, 423

Heating by hot water, 442

— by steam, 432, 436, 440

Heath honeysuckle, 268

Heaths, 279

Hehner, 94

Heinzerling, 203

Helvetia leather, 381

Hemicollin, 60

Hemlock-bark, 222

Hen-dung, 179, 181

Henry, 95

“Hickory” bark, 291

Hide-fibre, analysis, 57

— -markets, 33

— -mill, 117

— powder, 310, 312, 479, 484

— — filter, 311, 478

— — chromed, 313, 483

High-speed machinery, 451

Hofmeister, 56, 57, 60

Holbrook system, 331

Holden fat, 359

Horns, 464

Horn-sloughs, 464

Horny structures, 50

Horse-fat, 357

— -flesh, 177

— -power, 423

Hruschau, 214

Hull, 163, 165

Hummel, 203, 250, 285

Hunt, 188

Hyaline layer, 50, 176, 398

Hydrochloric acid, 86, 154, 157

Hydronaphthol, 30

Hypoderma bovis, 43

Hyposulphite of soda, 204

Hyphæ, 14

I.A.L.T.C. method, 300, 311, 475

Ice, heat to melt, 423

Ilex, 256

Immiscible liquid, 76

Inga, 293

Inks, 402

“Inoffensive,” 143

International Association of Leather Trade Chemists, 300, 311, 475

Internal pressure of liquids, 76

Invertase, 16

Iodine-value, 353

Ionisation-pressure, 81

Ions, 80

Iron-alum, 199

— -bark tree, 284

— -blacks, 398, 413

— in water, 102

— stains, 22, 38

— tannages, 198

Izal, 28

Jamrosa bark, 282

Japans, 355

Jeye’s fluid, 28

Jellies, 77

Jensen, 241

Jones fleshing machine, 148

Juniper, 248

Kaspine leather, 380

Kath, 289

Kathreiner, 301

Kation, 80

Kent, 236

Keratin, 14, 56, 68

Kermes oak, 258

Kid-leather, 9

Kilogram, 481

Kips, soaking, 113

Kjeldahl’s method, 70, 179

Klemm, 381

Knapp, 74, 188, 199, 202, 210, 382

Knoppern, 262

Knotted tree, 268

Koch, 251

Koerner, 82, 91, 283

Krameria, 269

Lace-Leathers, 197

Lactic acid, 154, 158, 221, 410

— fermentation, 18

Lamb, 218, 273, 405, 485

Land filtration, 470

Lanoline, 359

Lanosoap, 218

Larch, 247

Larix, 247

Lauraceæ, 267

Layers, 222, 231

Leach-bottom, 329

Leaching, 328

Lead-bleach, 399

— in water, 104

Leather Industries Laboratory Book, 5

Leguminosæ, 288

Leidgen unhairing machine, 145

Lentisque, 269

Leucadendron, 268

Leucine, 61

Leucospermum, 268

Levulose, 16

Lewkowitsch, 366

Lietzmann, 382

L.I.L.B., 5

Liliaceæ, 248

Lime, 21, 120

— action on hide, 125

— analyses, 124

— “available,” 125

— -burning, 121

— -liquors, analysis, 143

— pits, 127, 455

— quantity used, 129

— solubility in water, 123

— -water, 123

Limes, age of, 130

— bacterial action in, 134

— plumping, 133

Liming, 126

— loss of hide-substance, 132

— Pullman’s method, 137

— sheep-skins, 34

— temperature, 129

Linolenic acid, 355

Lipowitz, 59

Liquor-pipes, 456

Liquid state of matter, 74

Liquor tanks, 332, 457

— -troughs, 333, 457

Liter, 481

Logwood, 286, 413, 398, 401

Loxopteryngium, 269

Lubrication, 453

Lufkin, Prof., 142

Lymph corpuscules, 10

Lysol, 28

McFadyen, 61

Madder, 239, 277

Maiden, 290

Magenta, 395

Magnesia, 95

Malpighia, 269

Malpighiaceæ, 269

Manganese, 185

Mangifera, 277

Mangle, 283

Mango, 277

Mangosteen, 293

Mangrove, 283

— bark, extraction, 348

Mangrutta, 269

Market-hides, 33, 108

“Marking off,” 406

— weight of hides, 33

Marsh Rosemary, 268

Mather and Platt, 97

Mauve, 394

Maynard, 114

“Mellowing” of liquors, 82

Mellowness of liquors, 229

Mercuric chloride, 25

— iodide, 26

Metabisulphite of soda, 25, 114, 160

Meter, 481

Metrical system, 481

Milk-shaker, 313

Millon’s reagent, 67

Mill for samples, 303

Mills, arrangement of, 452

— construction, 316

Mimosa, 231, 290

— extraction, 346

Mimoseæ, 288

Mineral acids, 23

Moellon, 368, 380

Moisture in tanning materials, 314, 315, 479, 482

Molecules, 74

Mordant colouring matters, 238

Mordants, 398

Moulds, 14, 15, 20

Mountain ash, 285

Mucous layer, 47

Mud, 102

Muir, John, 141

Multiple effect, 342, 423

Munkwitz, 145

Muscle, voluntary, 53

Mycoderma, 14, 20

Myrica, 250

Myricaceæ, 250

Myrobalans, 231, 280, 293

— crusher, 322

— extraction, 345

Myrtaceæ, 284

Myrtus, 284

Nancite, 269

Naphthalene sulphonic acid, 29

Naphthols, 29

Nauclea, 277

Neb-neb, 289

Nesbitt’s bating process, 161

“Neutralising” chrome leathers, 216

Nihoul, 104

Nitrates and nitrites in water, 104

Nitrogen estimation, 70

“Non-tannins,” 310, 478, 483

Nucleolus, 11

Nucleus, 11

Oak-Bark, 222, 253

— - — extraction, 344

— -twigs, 244

Oakwood, 254

— extract, 222, 231, 256

Oaks, 252

Œnothera, 284

Oil, Arctic sperm, 371

— birch, 372

— black birch, 373

— boiled linseed, 363

— bottlenose, 371

— castor, 353, 355, 360

— cod-liver, 365

— cottonseed, 364

— egg-yolk, 393

— from fats, 463

— herring, 368

— Japanese, 368

— linseed, 362

— menhaden, 367

— neatsfoot, 358

— olive, 359

— porgie, 367

— Russia, 372

— sandalwood, 373

— sardine, 368

— sassafras, 373

— seal, 367

— sesamé, 364

— shark-liver, 366

— sod, 368, 380

— sperm, 353, 371

— Straits, 367

— Three-crown, 367

— Turkey-red, 361

— vaseline, 375

— whale, 367

— wintergreen, 373

Oils and fats in currying, 384

— blown, 355, 361

— drying, 353

— essential, 350, 372

— fixed, 350

— lubricating, 453

— mineral, 374

— non-drying, 353

— resin, 376

— volatile, 372

Oleic acid, 240, 354, 360

Oleine, 359

Oleostearine, 356, 359

Onagraceæ, 284

One-bath chrome process, 211

Organised ferments, 15

Origin of leather manufacture, 1

Osmotic pressure, 78

Osyris, 267

Ovum, development of, 46

Oxalates, 159

Oxalic acid, 155, 221

Oxalideæ, 280

Oxalis, 280

Oxynaphthoic acid, 30, 163

Ozokerit, 376

Paal, 57, 62, 66

Paessler, 56

Pairing, 407

Palmer, A. N., 167

Palmer, T., 176

Palmetto, 245

Palmæ, 248

Pancreatin, 172

Panniculus adiposus, 53

Papilionaceæ, 285

Paraffin, 375

Paraform, 31

Parapeptones, 66

Parenchym, 243

Parker, J. G., 162

Parker, C. E., 455

Pars papillaris, 51

“Partial” pressure, 76

Paypay, 293

Payne and Pullman, 137

Peaty waters, 106

Penicillium, 14

Pepsin, 171

Peptones, 60, 61, 62

Perching, 188

Perchromic acid, 200

Perkin, 250, 394

— and Allen, 276

— and Gunnell, 269

Permanent hardness, 100

Persea, 267

“Persians,” 235, 287, 299, 365

Phenol, 26

— for deliming, 162

Phenols, 295

Phenolphthalein, 155

Phloem, 243

Phlobaphenes, 231

Phloroglucol, 295, 297

Phosphates, 159

Phyllanthus, 293

Phyllocladus, 248

Pickling, 23, 89, 187

Pigeon-dung, 178

Pilang, 290

Pinus, 246

Pipes, arrangement of, 436, 440

— heat from, 432

Piptadenia, 293

Pistacia, 269, 272

Pits, construction of, 454

Plaster-cure of Indian kips, 39

Pleating, 407

Plumbaginæ, 268

Podocarpus, 248

Poison ivy, 274

Polygalaceæ, 269

Polygenetic colours, 399, 403

Polygonaceæ, 264

Polygonum, 266

Polysulphides, 165, 211

“Polysulphin,” 139

Pomegranate, 285

Poplars, 264

Popp, 172, 174

Porcelain, to mark, 304

Porter-Clark, 98

Potassium dichromate, 201

— hydrate, 136

Potentilla, 285

Precipitation tanks, 468

Preller, 381

Press-leaches, 330

“Pricking,” 169

Primitive leather manufacture, 1, 73

Printing, 418

Protaceæ, 268

Procter, 203

Procter’s extractor, 306

Prosopis, 286

Protea, 268

Protocatechuic acid, 295

Protoplasm, 10

Pseudopodia, 11

Pterocarpus, 285

Puering, 8, 19, 152, 170, 233

Pulleys, 450

“pulling down,” 157

Pullman, 380

Pullman’s liming method, 137

Pulsometers, 459

Pumps, 457

Punica, 285

Putrefaction, 15, 19

Putrid soak, 113, 137

Putz, Dr., 69

Pyrogallol, 295

— tannages, 234

— tannins, 295

Pyroligneous acid, 154

Pyrrol, 62

Pyrus, 285

Quebracho, 231, 269, 277

— wood, extraction, 347

Quercetin, 263

Quercus, 252

Quicklime, 122

Rabinowitsch, 17

Raw hide leather, 381

Realgar, 142

Reddening of leather by light, 405

“Reds,” 231, 297, 339

Reimer, 58, 64

Resin, 376

Rete malpighi, 47

Rhatany, 269

Rhizophoraceæ, 283

Rhus, 270

Riems, 381

Roans, 235

Rollet, 64

Rolling machines, 224

Roman leathers, 2

Rosaceæ, 285

Rosin, 376

Rounding, 151

Rove, 261

Rubiaceæ, 277

Rumex, 264

Rusma, 139

“Russia” leather, 251

Sabal, 248

Saccharomyces, 14, 20

Saccharomycetes, 15

Saddening, 398

Salicaceæ, 263

Salicylic acid, 28, 295

Saliva-corpuscles, 10

Salix arenaria, 238, 263

— caprea, 239, 264

Salomon, 178

Salt, 22

— and acids, action on gelatine, 88

— -stains, 22, 38

Salts, action on hide, 84, 92

Salted hides, 109

Salting, 35

Sampling tanning materials, 301, 475

— tool, 301

Santalaceæ, 267

Saponification, 351

Sappan-wood, 287

Saturated solutions, 77

Saxifragaceæ, 280

Schilling, 62

Schinia, 272

Schinus, 270

Schmeija mill, 318

Schulze, 178

Schultz, A., 203, 204

— Jackson S., 112, 454, 456

Schutzenberger, 57

Scilla, 248

Scorza rossa, 248

Scouring, 384

— machine, 384

Screening tanning materials, 323

Scudding, 180

Sea lavender, 268

Seagrave-Bevington dryer, 438

Seaside grape, 267

Seasonings, 418

Sebaceous glands, 48

Semiglutin, 60

Semipermeable membranes, 78

Senna, 288

Septa, 14

Septic tank, 472

Settling tanks, 468

Sewage, 467

— purification, 468

Shafting, 448, 450

Shake-method, 312, 483

Shaving, 384

— machine, 384, 386

— mill, 323

Sheep-skins, 34

Shellac glaze, 401

Silent boiling jets, 334, 343

Silicic acid in water, 104

Silver fir, 246

Skens, 272

Skin, structure, 46

Skivers, alumed, 197

Skutch, 462

Slaking of lime, 122

Slocomb staking machine, 192

Sludge, 470

Smoked leathers, 2

Snakeweed, 266

Snoubar bark, 248

Soaking and washing, 7

— of hides, 108

— with caustic soda, 114

Soaps, 351

— cold process, 352

Soap test, 94

Society of Arts, 234

Soda in water, 103

Sodium bisulphate, 155

— carbonate, 139

— hydrate, 136

— silicate, 216

— sulphate, 23, 41

— sulphide, 114, 139

— thiosulphate, 204, 213, 216

Sole-leather tanning, 220

Solid solution, 83, 396

— state of matter, 74

Solubility of liquids, 76

Solution-pressure, 76, 78

Soluble phenyl, 28

Sorbus, 285

Souring, 410

Spent tan, 329, 464

— tans, analysis, 480

Spermaceti, 371

Splitting, 384

Sprinkler, 446

— -leach, 336

Spruce fir, 246

Spueing, 20, 353, 355, 390

Squill, 248

Staining, 415

— dyes suitable for, 486, 491

Stains caused by hard water, 99

— on sole-leather, 227

Staking, 188

— machines, 192

Staling, 34

Stanhope, 98

Statice, 268

Steam-engine, 423, 433, 448

— - — indicator, 449

— -pumps, 457

— -traps, 442

Stearic acid, 351

Stearin, 351, 359

Stearine glaze, 401, 415

Stenhouse, 296

Sterilisation, 18

Stinco, 272

Stippen, 109

Stocking, 180

Stocks, 116

— for unhairing, 145

Stone-cells, 245

— pits, 454

Striking, 223

— machine, 223

Stringy bark tree, 284

Structure of skin, 46

Stuffing, 386

— drum, 388

Sturtevant dryer, 438

Sudoriferous glands, 49

Sugar-bush, 268

Sulphate of soda, 23

Sulphates in water, 104

Sulphide of sodium, 34, 132, 139, 165

Sulphides, 139

Sulphur dioxide, 23

— in chrome-leather, 216

Sulphonated oils, 361

Sulphuric acid, 114, 154, 157, 410

Sulphurous acid, 23, 114, 338

Sumach, 234

— Cape, 267

— extraction, 347

— French, 277

— Sicilian, 270

— Venetian, 276

Sumachs, American, 273

Sumaching, 410, 411

Supersaturated solutions, 77

Surface-tension, 76

Suspenders, 221, 227, 232

Suspension lime-pit, 128

Swan, 202

Sweat-glands, 49

— -pit, 119

Sweating, 1, 19, 34, 119

Swedish glove-leather, 236, 238

Swelling, 82, 84

Tallow, 356

— fish, 368

Tamarix, 272, 280

Tamarisciniæ, 280

Tamwood, 269

Tan as fuel, 464

— -burning furnaces, 464

— -press, 467

Tanekahi bark, 248

Tanghadi bark, 287

Tank-waste, 141

Tannery, construction, 445

— extension, 447

— fire risks, 446, 452

— selection of site, 444

Tannin colour-lakes, 397

— materials, extraction, 305

— — sampling, 302

“Tanning matters,” 311, 478, 483

Tannins, 242, 294, 397

— pathological, 298

— physiological, 298

Tari pods, 286

Tartar emetic, 411

Tawing, 191, 196

Temperature, 422

— in leaching, 343

Temporary hardness, 94, 154, 411

Tengah bark, 283

Teri pods, 286

Terminalia, 280

Terra japonica, 277

Thann tree, 282

Thermophilic bacteria, 17

Tinian pine, 249

Tintometer, 315, 479

Titanium, 185, 218, 411, 495

Tjamara laut, 249

Topping, 406

Tormentilla, 285

Torula, 14

“Total soluble” matter, 307, 477, 478

Treacle, 177

Tri-formol, 31

Trimble, 263

Trioxymethylene, 31

Trypsin, 171, 172

Tsuga, 246

Tub-leaches, 331

Tugwar, 293

Turkey oak, 255, 256

— -red oil, 217, 240

Turwar bark, 235, 287

Turret-dryer, 439

Two-bath chrome process, 204, 213, 216

Tyrosin, 66

Unhairing, 7, 54, 143

— machines, 144

Unorganised ferments, 15, 16

Used liquors, analysis, 480

Vacciniæ, 280

Vaccinium, 280

Vacuoles, 13

Vacuum-oven, 308

— pans, 342

Valdivia leather, 267

Valonia, 222, 231, 258

— extraction, 345, 346

Valve, 457

— for liquor troughs, 333

Van Tieghem, 243

Vapour-pressure, 75, 421

Vaseline, 375

Vaughn fleshing machine, 145, 148

Vegetable-tanned leathers, 2, 3

Velocity of gaseous molecules, 75

Ventilation and heating, 429

— downward, 440

Verbeek and Peckholdt, 310

Vibration, 452

Vitellin, 67

Vitis, 272

Von Höhnel, 242

— Schroeder, 56, 129, 134

Wagner, 298

Warbles, 43

Ward, H. Marshall, 243

Wash-wheel, 108, 118, 180

— — for unhairing, 145

Washing of hides, 108, 111

Waste liquids, 467

Water, condensed, 442

— hardness, 93

— impurities, 93

— oven, 308

— raisers, 459

— softening, 95, 101

Wattles, 290

Wax, bees-, 371

— Brazilian, 372

— carnauba, 372

— Japan, 372

— mineral, 374

— paraffin, 375

Waxes, 350, 353, 370

— liquid, 350, 353, 371

Weak grain, 108

Weighing for analysis, 304

Weimannia, 280

Weiske, 63

“Wet and dry bulb” thermometer, 426

“White bark,” 293

— leathers, 197

— or gelatinous fibres, 50

— spruce, 247

Wichellow and Tebbutt, 241

Wild almond, 268

Williams’ patent crusher, 320

Willow-bark, 238

Willows, 263

Wilson, 223, 224, 440

Wind, 427, 439

Windbores, 459

Wood, J. T., 166, 171

Woolfat, 358

Woolly butt tree, 284

“Working,” 180

Xanthoproteic acid, 67

Yaryan evaporator, 339, 424

Yeast, 12

Yeasts, 15

Yellow fibres, 53, 69

Yolk of egg, 68

Yorkshire grease, 359

Youl, 231

Young hair, 144

Zinc chloride, 26

— sulphate, 26, 159

Zollickoffer, 160

Zymases, 15, 16, 17, 61, 296

LONDON: PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, GREAT WINDMILL STREET, W., AND DUKE STREET, STAMFORD STREET, S.E.

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