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