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
Sealing-wax, coloured, 103
Secretage of fur, 17
" process, injury to fur in, 17
Sericin, 7
Shellac, 62
" colouring of, 103
" rosin in, detection of, 63
" solvents for, 63
_See also_ Lac.
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