[_Out of print. Second Edition in preparation._] #Contents.# #India-Rubber# -- Botanical Origin -- Climatology -- Soil -- Rational Culture and Acclimation of the Different Species of India-Rubber Plants -- Methods of Obtaining the Latex -- Methods of Preparing Raw or Crude India-Rubber -- Classification of the Commercial Species of Raw Rubber -- Physical and Chemical Properties of the Latex and of India-Rubber -- Mechanical Transformation of Natural Caoutchouc into Washed or Normal Caoutchouc (Purification) and Normal Rubber into Masticated Rubber -- Softening, Cutting, Washing, Drying -- Preliminary Observations -- Vulcanisation of Normal Rubber -- Chemical and Physical Properties of Vulcanised Rubber -- General Considerations -- Hardened Rubber or Ebonite -- Considerations on Mineralisation and other Mixtures -- Coloration and Dyeing -- Analysis of Natural or Normal Rubber and Vulcanised Rubber -- Rubber Substitutes -- Imitation Rubber. #Gutta Percha# -- Botanical Origin -- Climatology -- Soil -- Rational Culture -- Methods of Collection -- Classification of the Different Species of Commercial Gutta Percha -- Physical and Chemical Properties -- Mechanical Transformation -- Methods of Analysing -- Gutta Percha Substitutes -- Index. #LEATHER TRADES.# #PRACTICAL TREATISE ON THE LEATHER INDUSTRY.# By A. M. VILLON. Translated by Frank T. ADDYMAN, B.Sc. (Lond.), F.I.C., F.C.S.; and Corrected by an Eminent Member of the Trade. 500 pp., royal 8vo. 123 Illustrations. Price 21s. net. (Post free, 21s. 6d. home; 22s. 6d. abroad.) #Contents.# Preface--Translator's Preface--List of Illustrations. Part I., #Materials used in Tanning# -- Skins: Skin and its Structure; Skins used in Tanning; Various Skins and their Uses -- Tannin and Tanning Substances: Tannin; Barks (Oak); Barks other than Oak; Tanning Woods; Tannin-bearing Leaves; Excrescences; Tan-bearing Fruits; Tan-bearing Roots and Bulbs; Tanning Juices; Tanning Substances used in Various Countries; Tannin Extracts; Estimation of Tannin and Tannin Principles.