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X Rays. 



PRACTICAL X RAY WORK. By Frank T. Addyman, 



B.Sc. (Lond.), F.I.C., Member of the Roentgen Society of London; 

 Radiographer to St. George's Hospital; Demonstrator of Physics and 

 Chemistry, and Teacher of Radiography in St. George's Hospital 

 Medical School. Demy 8vo. Twelve Plates from Photographs of X Ray 

 Work. Fifty-two Illustrations. 200 pp. Price 10s. 6d. net. (Post free, 

 10s. lOd. home; lis. 3d. abroad.) 



Contents. 



Historical — Work leading up to the Discovery ot the X Rays — The Discovery — Appara^ 

 tus and its Management — Electrical Terms— Sources of Electricity — Induction Coils- 

 Electrostatic Machines — Tubes — Air Pumps — Tube Holders and Stereoscopic Apparatus — 

 Fluorescent Screens — Practical X Ray Work — Installations — Radioscopy — Radiography — 

 X Rays in Dentistry — X Rays in Chemistry — X Rays in War— Index. 



Lsst of Plates. 



Frontispiece — Congenital Dislocation of Hip-Joint. — 1., Needle in Finger. — II., Needle in 

 Foot. — III., Revolver Bullet in Calf and Leg. — IV., A Method of Localisation. — V , Stellate 

 Fracture of Patella showing shadow of "Strapping". — VI., Sarcoma. — VII., Six-weeks-old 

 Injury to Elbow showing new Growth of Bone. — VIII., Old Fracture of Tibia and Fibula 

 badly set. — IX., Heart Shadow. — X., Fractured Femur showing Grain of Splint. — XI., Bar- 

 ren's Method of Localisation. 



India-Rubber and Giitta Percha. 



INDIA-RUBBER AND GUTTA PERCHA. Second 

 English Edition, Revised and Enlarged. Based on the French work of 

 T. Seeligmann, G. LaiMy Torrilhon and H. Falconnet by John 

 Geddes iMclNTOSH. Royal 8vo. 100 Illustrations. 400 pages. Price 

 12s. 6d. net. (Post free, 13s. home ; 13s. 6d. abn ad.) 



Contents. 



India- Rubber.— Indiarubber, Latex — Definitions — Laticiferous Vessels — Botanical Origin 

 — Habitats — Methods of obtaining the Latex — Methods of Preparing Raw or Crude India- 

 rubber — Rubber Cultivation in Various Counti'ies — Climatolojiy — Soil — Rational Culture and 

 Acclimatisation of the Different Species of Indiarubber Plants — Classification of the Com- 

 mercial Species of Raw Rubber — Physical and Chemical Properties of the Latex and of 

 Indiarubber — General Considerations — Mechanical Transformation of Natural Rubber into 

 Washed or Normal Rubber (Purification) — Softening, Cutting, Washing, Drying, Storage — 

 Mechanical Transformation of Normal Rubber into Masticated Rubber — Vulcanisation of 

 Normal Rubber — Chemical and Physical Properties of Vulcanised Rubber — 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 — Analysis of Indiarubber. 



Gutta Percha. — Definition of Gutta Percha — Botanical Origin — Habitat — Climatology — 

 Soil— Rational Culture — Methods of Col ection — Felling and Ringing.' i-ersMS Tapping— Extrac- 

 tion of Gutta Percha from Leaves by Toluene, etc. — Classification of the Different Species of 

 Commercial Gutta Percha — Physical and Chemical Properties of Gutta Percha — Mechanical 

 Treatment of Gutta Percha — Methods of Analysing Gutta Percha — Gutta Perchr Substitutes. 



Leather Trades. 



PRACTICAL TREATISE ON THE LEATHER IN- 

 DUSTRY. By A. M. Villon. Translated by Frank T. 

 Addyman, B.Sc. (Lond.), F.l.C, F.C.S. ; and Corrected by an Emi- 

 nent Member of the Trade. 500 pp., royal 8vo. 123 Illustrations. 



[Out of print. 

 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. 



Part 11., Tanning — The Installation of a Tannery: Tan Furnaces: Chimneys, Boilers, 

 etc.; Steam Engines — Grinding and Trituration of Tanning Substances: Cutting up Bark; 

 Grinding Bark; The Grinding of Tan Woods; Powdering Fruit, Galls and Grains; Notes on 

 the Grinding of Bark — Manufacture of Sole Leather: Soaking; Sweating and Unhairing; 

 Plumping and Colouring; Handling; Tanning; Tanning Elephants' Hides; Drj-ing; 

 Striking or Pinning — Manufacture of Dressing Leather- Soaking; Depilation ; New Pro- 

 cesses for the Depilation of Skins; Tanning: Cow Hides; Horse Hides: Goat Skins, Manu- 

 facture of Split Hides — On Various Methods of Tanning: Mechanical .Methods; Physical 

 Methods: Chemical Methods; Tanning with Extracts — Quantity and Quality: Quantity; 

 Net Cost; Quality of Leather — Various Manipulations of Tanned Leather: Second Tanning; 

 Grease Stains; Bleaching Leather; Waterproofing Leather; Weighting Tanned Leather; 

 Preservation of Leather — Tanning Various Skins. 



