latent heat of, 34
" lead in, detection of, 47
" lime in, detection of, 46
" magnesium in, detection of, 46
" purification of, 45
" purity of, tests for, 46
" soft, 40
" effect of carbonic acid in hardening, 40
" sulphates in, detection of, 24

Wood acid, 64
" destructive distillation of, 64
" spirit, 64

Wool, chrome mordanting of, 77
" dead: why it will not felt, 18
" dyeing, with coal-tar colours, 105
" felted, effect of boiling water on finish and strength of, 22
" felted, effect of stiffening process on finish of, 66, 103
" felting of, interlocking of scales in, 13
" fibre, 8
" " action of acids on, 23
" " " of alkalis on, 24
" " composition of, 22
" " curly structure of, 15
" " distinction between, and hair, 12, 14
" " growth of, 8
" " hygroscopicity of, 20
" " structure of, from diseased sheep, 19
" " sulphur in, reagents for detection of, 26
" grease, 100
" kempy, 19
" merino, 15
" mordanting, 75
" scouring, 101
" stripping of, 23

Woollen goods, indigo-dyed, recovery of indigo from, 24
" " mixed cotton and, separation of, 5

Xylenes, 90

Yellow colour, absorption spectrum of pure, 114

Yolk. _See_ Wool grease.

Abridged Catalogue

OF

_Special Technical Books_.

INDEX TO SUBJECTS.

PAGE

Agricultural Chemistry, 9
Air, Industrial Use of, 10
Alum and its Sulphates, 8
Ammonia, 8
Aniline Colours, 3
Animal Fats, 6
Anti-corrosive Paints, 4
Architecture, Terms in, 22
Architectural Pottery, 12
Artificial Perfumes, 7

Balsams, 9
Bleaching, 17
Bleaching Agents, 17
Bone Products, 8
Bookbinding, 23
Brick-making, 11, 12
Burnishing Brass, 20

Carpet Yarn Printing, 16
Casein, 4
Celluloid, 23
Cement, 22
Ceramic Books, 11
Charcoal, 8
Chemical Essays, 8
Chemical Works, 8
Chemistry of Pottery, 12
Clay Analysis,