We Three Quarto Volumes of about 400 pages each, ‘small 4to, and an Atlas of 66 pages of maps 
; in colours, 133 X 19%, bound in heavy paper cover. Price £5 5s. per set net. 
7 THE COAL RESOURCES OF THE WORLD. 
An Inquiry made upon the initiative of 
THE EXECUTIVE COMMITTEE OF THE TWELFTH INTERNATIONAL 
GEOLOGICAL CONGRESS, CANADA, 1913, 
with the assistance of 
_ GEOLOGICAL SURVEYS AND COUN et ee OF DIFFERENT 
EDITED BY THE 
GEOLOGICAL SURVEY OF CANADA. 
“The preparation of the monograph involved a large amount of special investigation in several of the 
countries from which reports were submitted, and the three volumes with the atlas of beautifully executed 
maps will serve as a fitting companion volume to The Iron Resources of the World.’’—Natwre. 
este OF BOOKS OFFERED FOR SALE 
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CRAIG (E.H.C.). Oil Finding: an Introduction to the Geological Study 
of Petroleum. 2nded. London, 1914. 8vo. pp. 208. Cloth. 8s. 6d. 
CRAMPTON (C. B.) anD CARRUTHERS (R. G.). The Geology of Caithness. 
Edinburgh (Geol. Sury.), 1914. S8vo. Illustrated. 4s. 
DANA. Third Appendix to the Sixth Hdition of Dana’s System of 
Mineralogy, by William E. Ford. Completing the Work to 1915. New 
York, 1915. 8vo. pp. xiii+ 87. Cloth. 6s. 6d. 
ECKEL (E. C.). Iron Ores: their occurrence, valuation, and control. New 
York, 1914. S8vo. Illustrated. Cloth. 17s. 
FINLAY (G. I.). Introduction to the Study of Igneous Rocks. London, 1913. 
Crown 8yo. pp. 228, with 3 coloured plates and numerous illustrations. 
Flexible leather. 8s. 6d. j 
GREGORY (J. W.). Geology of To-day. A popular introduction in simple 
language. London,1915. 8vo. pp. 328, with 24 plates and illustrations. 
Cloth. 5s. 
HUTCHINSON (H. G.). Life of Sir John Lubbock (Lord Avebury). London, 
; 1914. 2vols. 8vo. pp. 352, 344. £1 10s. 
IDDINGS (J.). The Problems of Volcanism. (Silliman Memorial Lectures.) 
New Haven, 1914. Roy. 8vo. With 86 illustrations and chart. Cloth. 
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JOHANSSEN (A.). Manual of Petrographic Methods. New York, 1914. 8vo. 
Illustrated. Cloth. £1 5s. 
JOLY (J.). The Birth-time of the World, and other scientific essays. London, 
1915. 8vo. With 28 plates and 15 illustrations in text. Cloth. 10s. 6d. 
KEITH (A.). The Antiquity of Man. London, 1915. S8vo. With 189 
illustrations. Cloth. 10s. 6d. 
LAKE (P.). Physical Geography. Cambridge, 1915. S8vo. With 20 plates. 
Cloth. 7s. 6d. 
LANKESTER (Sir Ray). Diversions of a Naturalist. London, 1915. 8vo. 
With coloured front and 43 other illustrations. Cloth. 6s. © 
LECONT (J.). Elements of Geology. 5th ed., revised and enlarged. With 
new plates and illustrations. New York, 1915. Syvo. Cloth. 18s. 
LEITH (C. K.). Structural Geology. London, 1914. 8vo. pp. 169, with 
68 text-illustrations. Cloth. 6s. 6d. ~ 
Its purpose is the study and interpretation of rock-structures, not for 
themselves, but for the light they may throw on stratigraphic problems, 
on economic geology, on the causes underlying the general configuration 
of the earth, and on the earth’s history. 
