y LEONARD A. PARRY, M.D., B.Sc. (Lond.). 196 pp.
Demy 8vo. Price 7s. 6d. net. (Post free, 7s. 10d. home; 8s. abroad.)

(Industrial Uses of Air, Steam and Water.)

DRYING BY MEANS OF AIR AND STEAM. Explanations, Formulae, and Tables
for Use in Practice. Translated from the German of E.
HAUSBRAND. Two folding Diagrams and Thirteen Tables. Crown 8vo. 72
pp. Price 5s. net. (Post free, 5s. 3d. home; 5s. 6d. abroad.)

(_See also "Evaporating, Condensing and Cooling Apparatus," p. 19._)

PURE AIR, OZONE, AND WATER. A Practical Treatise of their Utilisation
and Value in Oil, Grease, Soap, Paint, Glue and other Industries. By
W.B. COWELL. Twelve Illustrations. Crown 8vo. 85 pp. Price 5s.
net. (Post free, 5s. 3d. home; 5s. 6d. abroad.)

THE INDUSTRIAL USES OF WATER.
COMPOSITION--EFFECTS--TROUBLES--REMEDIES--RESIDUARY
WATERS--PURIFICATION--ANALYSIS. By H. DE LA COUX. Royal 8vo.
Translated from the French and Revised by ARTHUR MORRIS. 364
pp. 135 Illustrations. Price 10s. 6d. net. (Post free, 11s. home; 11s.
6d. abroad.)

(_See Books on Smoke Prevention, Engineering and Metallurgy, p. 19,
etc._)

_For contents of these books, see List III._

(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. 10d. home; 11s. 3d. abroad.)

(India-Rubber and Gutta Percha.)

INDIA-RUBBER AND GUTTA PERCHA. Second English Edition, Revised and
Enlarged. Based on the French work of T. SEELIGMANN, G.
LAMY TORRILHON and H. FALCONNET by JOHN GEDDES
MCINTOSH. Royal 8vo. 100 Illustrations. 400 pages. Price 12s. 6d.
net. (Post free, 13s. home; 13s. 6d. abroad.)

(Leather Trades.)

THE LEATHER WORKER'S MANUAL. Being a Compendium of Practical Recipes
and Working Formulae for Curriers, Bootmakers, Leather Dressers, Blacking
Manufacturers, Saddlers, Fancy Leather Workers. By H.C.
STANDAGE. Demy 8vo. 165 pp. Price 7s. 6d. net. (Post free, 7s. 10d.
home; 8s. abroad.)

(_See also Manufacture of Shoe Polishes, Leather Dressings, etc., p.
6._)

(Pottery, Bricks, Tiles, Glass, etc.)

MODERN BRICKMAKING. By ALFRED B. SEARLE, Royal 8vo. 440
pages. 260 Illustrations. Price 12s. 6d. net. (Post free, 13s. home;