1．INTRODUCTION 1
2．HISTOLOGY OF SKIN 5
3．THE COMPOSITION AND CHEMICAL STRUCTURE OF SKIN 12
4．COMBINATION OF PROTEINS WITH ACIDS,BASES,SALTS AND HEAVY METALS 67
5．SHRINKAGE TEMPERATURE OF COLLAGEN 119
6．MICRO?RGANISMS 136
7．CURING 139
8．SOAKING 158
9．LIMING AND DEPILATION 168
10．BATING 244
11．PICKLING 256
12．ALDEHYDE TANNING 332
13．QUINONE TANNING 388
14．CHEMISTRY OF CHROMIUM SALTS 411
15．CHROME TANNING 419
16．THEORY OF CHROME TANNING 538
17．VEGETABLE TANNING 548
18．THEORY OF VEGETABLE TANNING 618
19．IRON TANNING 628
20．ALUM TANNING 656
21．SYNTANS 682
22．MISCELLANEOUS TANNAGES 693
23．NEUTRALIZING 716
24．FATLIQUORING,OILING AND STUFFING LEATHER AND THE MATERIALS EMPLOYED 723
25．PHYSICAL TESTING METHODS 757
AUTHOR INDEX 791
SUBJECT INDEX 795