Hats dyed logwood black, deterioration of, 104 " greening of black, 65 " stiffening and proofing of, 63, 64 " stiffening and proofing of, by Cheetham's process, 66 " stiffening and proofing of, by Continental process, 66 " stiffening and proofing process, effect of, in dyeing, 65, 103 Heat, latent, 32, 33 " " of steam, 34 " " of water, 34 Heddebault's process of separating mixed cotton and woollen goods, 5 Hydrochloric acid, manufacture of, by Hargreaves & Robinson's process, 53 " " manufacture of, by salt-cake process, 53 Ice, heat of liquefaction of, 34 Ice-making machine, Carre, 32 Indican, 85 Indicators, 50, 70 Indigo, 85 " artificial, 86 " blue, 85 " recovery of, from indigo-dyed woollen goods, 24 " vat, 86 " white, 85 Insoluble compounds, precipitation of, from solutions, 38 Iron liquor. _See_ Mordant, iron. Jute fibre, 3 " composition of, 4 Lac, button, 63 " dye, 62, 99 " seed, 62 " stick, 62 _See also_ Shellac. Lakes, colour, 75 Latent heat. _See_ Heat. Leblanc process, 53 Light, analysis of white, 107 " composition of white, 107 " homogeneous or monochromatic, 108, 110 " rays, refraction of, 108 Linen fibre. _See_ Flax. Litmus, 70, 86 Logwood, 75, 76, 78, 83, 99 Logwood black, 78, 81, 104 " " deterioration of hats dyed with, 104 Madder, 80, 83, 99 Magenta, 76, 80, 83, 91, 97 Marsh gas, 95 Mercuric nitrate, use of, for the secretage of fur, 17 Merino wool, 15 Methane. _See_ Marsh gas. Methyl alcohol. _See_ Wood spirit. " green, 97 " violet, 97 Mirbane, essence of, 96 Molisch's test, 4 Mordant, alumina, 64, 75 " antimony, 76 " iron, 64, 76 " tannin, 76 " tin, 76 Mordanting acid (phenolic) colours, 74 " basic colours, 76 " chrome, 77 " woollen fabrics, 75 Mordants, 69 " fatty acid, 77 Naphthalene, 90, 98 Naphthol yellow, 91 Naphthols, 91, 98 Naphthylamine, 91 Nitric acid, 95 " manufacture of, 52 Nitrobenzene, 96 Nitroprusside of soda, 26 Oils, decomposition of, by superheated steam, 35 Orcein, 86 Orchil, 85, 86 Orcin, 86 Orellin, 88 Over-chroming, _See_ Chroming. Paint, Crookes' heat-indicating, 107 Persian berries, 75, 99 Phenol, 90 " constitution of, 98 Phenolic colours. _See_ Acid colours. Phenolphthalein, 70 Picric acid, 81, 91 " absorption spectrum of, 113 " constitution of, 98 Plumbate of soda, 26 Potassium, decomposition of water by, 25, 30 Proofing mixture, 63 " process, 64 " " Cheetham's, 66 " " Continental, 66 " " effect of, in dyeing, 65, 103 Purpurin, 99 Quercitron, 99 Red liquor. See Mordant, alumina. Refraction of light rays, 108 Safflower, 85, 87 Salt-cake process, 53 Salts, 49 " acid, 70, 71 " basic, 71 " neutral or normal, 71 " stable, 72 " unstable, 72 Santalin, 99 Santalwood, 99