DISCOVERY 



139 



to indicate the lamentably small space in wluch scientific 

 surmise may disport itself. 



To sum up the author's theories, it may be said that 

 he believed that at least two races of ancient man could 

 be differentiated — Aurignac man and Neanderthal man. 

 The former came from Asia, and was distantly related to 

 the orang-outang ; the latter from Africa, and was a 

 cousin of the gorilla. Perhaps other races were similarly 

 relp^ted to the chimpanzee and gibbon. 



For the rest, his outline of man's advance, his descrip- 

 tions of Australian customs, and liis obiter dicta deserve 

 more space than can here be allotted to them. He 

 thought that the wearing of clothes was ruining the "human 

 figure, evolved by long ages of aesthetic selection, now 

 mainly impossible ; he thought that man retained his 

 power to vary, parado.xically, by remaining primitive — ■ 

 to grow hoofs, like a horse, is to commit yourself to a line 

 of your own, whereas to retain the primitive hand, like 

 the newt and man, is to retain the potentiality (precious 

 word !) of development. The reader will learn why dingo 

 dogs do not bark, and what the gibbon's attitude toward 

 life is : he will read of a suggestion as to the primitive 

 language of man, and will appreciate, we believe, that 

 the author was not only a very learned, but a most 

 human individual in his affection both for animals and 

 for man savage and civihsed. The book is admirably 

 printed, as an example of the difficult art of translation 

 it is thoroughly to be commended, and not the least part 

 of its attractiveness arises from its many excellent illus- 

 trations. In conclusion, Professor Klaatsch's own words 

 should be quoted: " The man who would form his own 

 judgment on these matters will find it necessary to make 

 a thorough study of the skeletons of man and the anthro- 

 poid apes. It is no use just making sceptical remarks 

 on the subject." 



. R. J. V. P. 



Books Received 



PSYCHOLOGY AND PHILOSOPHY 



Macrobius, or Philosophy, Science, and Letters in the Year 

 400. By Thomas Whittaker. (Cambridge Uni- 

 versity Press, 6s. 6d.) 



The Meaning of Meaning. By C. K. Ogden, M.A., and 

 J. A. Richards, M.A. (Kegan Paul, 2$. 6d.) 



The Appearance of Mind. By James Clark McKerrow, 

 M.B. (Longmans, Green & Co., 5s.) 



Psycho-analysis and Suggestion Therapy. By Dr. 

 WiLHELM Stekel. (Kegan Paul, 6s. 6d.) 



ECONOMICS 



Food Production in War. By Thomas Hudson Middle- 

 ton, K.B.E., C.B., LL.D., Deputy Director-General, 

 Food Production Department. (Oxford : at the 

 Clarendon Press, los. bd. net.) 



SCIENCE 



The Spectroscope : and its Uses in General Analytical 

 Chemistry. By T. Thorne Baker, A.M.I.E.E., 

 F.R.P.S. Second Edition. (Bailliere, Tindall &Cox, 

 7s. 6d.) 



II tnetodo sperimentale secondo Leonardo da Vinci, e 

 sua applicazioni alia teoria cinetica del gas. (Roma : 

 Casa Edit : " L'elettricista.") 



Relativity. By Norman Robert Campbell, Sc.D. (Cam- 

 bridge University Press, 7s. 6d.) 



Scientific Thought. A Philosophical Analysis of Some of 

 its Fundamental Concepts in the Light of Recent 

 Physical Developments. By C. D. Broad, M.A., 

 Litt.D. (Kegan Paul, Trench, Triibner & Co., 165.) 



An Introduction to the Principles of Mechanics. By J. F. S. 

 Ross, M.C., B.Sc, A.M.I.Mech.E. (Jonathan Cape, 

 I2S. 6d.) 



General Science. Part I. By George Thompson and 

 George H. Leslie. (Cassell & Co., Ltd., 2s.) 



Colour and Methods of Colour Reproduction. By L. C. 

 Martin, D.I.C, D.Sc. With chapters by William 

 Gamble, F.R.P.S. (Blackie ct Son, Ltd., 12s. 6d.) 



The Generation and Utilisation of Cold. A General Dis- 

 cussion held by the Faraday Society. los. bd. 



(Mention in this column does not preclude a review.) 



ARCH.EOLOGY and ANTHROPOLOGY 



A History of Magic and Experimental Science. By Prof. 

 L. Thorndike, Ph.D. In two volumes. (New 

 York : The Macmillan Company.') 



The Evolution and Progress of Mankind. By Prof. 

 Hermann Kla.\tsch, M.D. Edited and enlarged 

 by Adolf Heilbron, M.D. Translated by Joseph 

 McC.^BE. (T. Fisher Unwin, 25s. net.) 



PHILOLOGY 



The Study of English Speech by New Methods of Phonetic 

 Investigation. By E. W. Scripture, Ph.D. (Pub- 

 lished for the British Academy by Humplirey Milford, 

 Oxford University Press, 3s. td.) 



Correspondence 



AXIAL ROTATION 



To the Editor of Discovery 



Sir, 



Will you be good enough to deal with the above 

 subject in Discovery ? 



I am prompted to ask this question by the extreme 

 perplexity I always feel when I meet with the statement 

 that the " moon rotates upon its axis." Always in this 

 connection synchronisation of rotation and revolution 

 is specially mentioned as being something remarkable. 

 The same is the case when deahng with the planets 



