Fibres, action of acids on textile, 5
    " " alkaline solution of copper and glycerin on textile, 28
    " " alkalis on textile, 5
    " " caustic soda on textile , 28
    " " copper-oxide-ammonia on textile, 28
    " " nitric acid on textile, 28
    " " steam on textile, 5
    " " sulphuric acid on textile, 27

Fibres, animal, 6
  " bast, 3
  " vegetable, 1
  " " and animal, determining, in mixture, 27
  " " and animal, distinguishing, 4, 5
  " " and animal, distinguishing and separating, 24

Fibroin, 7

Flax fibre, action of basic zinc chloride on, 5
  " composition of, 3
  " structure of, 2

Fraunhofer’s lines, 111, 112

Fur, 8
  " action of acids on, 23
  " " of alkalis on, 24
  " " on, in secretage process, 17
  " chrome mordanting of, 77
  " composition of, 22
  " felting, 15
  " finish and strength of felted, effect of boiling water on, 22
  " hygroscopicity of, 20
  " preparation of, for felting, 18
  " secretage or carrotting of, 17
  " stiffening and proofing of felted, 66
  " sulphur in, reagents for detection of, 26

Fustic, 99

Gallein, 82, 83

Gallnuts, 99

Garancine, 99

Guy-Lussac tower, 52

Glover tower, 52

Glucose, 4

Greening of black hats, 65

Haematein, 76, 78 83, 99

Hair, 8
  " cells from, 11
  " distinction between, and wool, 12, 14
  " dyeing, 26
  " growth of, 8
  " scales from, 11
  " " of, action of reagents on, 12
  " scaly structure of, 11
  " structure of, 8, 9
  " sulphur in, reagents for detection of, 26

Hargreaves & Robinson’s process, 53

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