8 Mr. Edward Arnold 's Technical & Scientific Books 

 The Evolution Theory. By DR. AUGUST WEIS- 



MANN, Professor of Zoology in the University of Freiburg in Breisgau. 

 Translated, with the Author's co-operation, by J. ARTHUR THOMSON, 

 Regius Professor of Natural History in the University of Aberdeen ; and 

 MARGARET THOMSON. Two vols., xvi + 4i6 and viii + 396 pages, with over 

 130 Illustrations. Royal 8vo., cloth, 325. net. 



" The subject has never been so fully and comprehensively expounded before ; and 

 it is not necessary to subscribe to all the author's tenets in order to recognise the value 

 and the absorbing interest of his exposition, with its prodigious wealth of illustration, 

 its vast store of zoological knowledge, its ingenious interpretations and far-reaching 

 theories. English readers have rea?on to be grateful to Professor and Mrs. Thomson 

 for their admirable translation." The Times. 



The Chances of Death and Other Studies in 



Evolution. By KARL PEARSON, M.A., F.R.S , Professor of Applied 

 Mathematics in University College, London, and formerly Fellow of King's 

 College, Cambridge. 2 vols., xii + 388 and 460 pages, with numerous 

 Illustrations. Demy 8vo., cloth, 255. net (post free 253. 6d.). 



The Life of the Salmon. With reference more 



especially to the Fish in Scotland. By W. L. CALDERWOOD, F.R.S.E., 

 Inspector of Salmon Fisheries for Scotland. Illustrated. Demy 8vo., 

 7s. 6d. net/ 

 " We have no hesitation whatever in advising all persons interested in the salmon, 



whether as fishermen, naturalists, or legislators, to add this book to their libraries." 



Nature. 



Animal Behaviour. By Professor C. LLOYD 



MORGAN, LL.D., F.R.S. , Principal of University College, Bristol. 

 viii + 344 pages, with 26 Illustrations. Crown 8vo., cloth, 75. 6d. net (post 

 free 7s. nd.). 



This important contribution to the fascinating subject of animal psycho- 

 logy covers the whole ground from the behaviour of cells up to that 

 of the most highly developed animals. 



BY THE SAME AUTHOR. 



Habit and Instinct. viii + 352 pages, with Photo- 

 gravure Frontispiece. Demy 8vo., cloth, i6s. 



Professor ALFRED RUSSEL WALLACE: "An admirable introduction to the study 

 of a most important and fascinating branch of biology, now for the first time based 

 upon a substantial foundation of carefully observed facts and logical induction from 

 them." 



BY THE SAME AUTHOR. 



The Springs of Conduct. Cheaper Edition. 



viii + 317 pages. Large crown 8vo., cloth, 35. 6d. This volume deals 

 with the Source and Limits of Knowledge, the Study of Nature, the Evolution 

 of Scientific Knowledge, Body, and Mind, Choice, Feeling; and Conduct. 



BY THE SAME AUTHOR. 



Psychology for Teachers. New Edition, entirely 



rewritten, xii + 308 pages. Crown 8vo., cloth, 45. 6d. 



An Introduction to Child Study. By Dr. W. B. 



DRUMMOND. Crown 8vo., cloth, 6s. net. 



The Child's Mind: Its Growth and Training. By 



W. E. URWICK, University of Leeds. Crown 8vo., cloth, 45. 6d. net. 

 LONDON : EDWARD ARNOLD, 41 & 43 MADDOX STREET, W. 



