56 



DISCOVERY 



ing companions " during his exile. Another and long 

 chapter on the coloration of insects, with numerous 

 details about protective, warning, and mimetic colours, 

 should prove most valuable to zoologists, as also the suc- 

 ceeding chapter on Pseudacresa eurytus, a most remark- 

 able polymorphic butterfly. Of its various mimetic 

 forms, together with model species of another butterfly, 

 Planema, two beautifully coloured plates are given. The 

 book also contains a large number of original photographic 

 illustrations. 



(6) Captain Angus Buchanan belongs more to the class 

 of adventurers and explorers, and though his book 

 abounds with descriptions of many new mammals, birds, 

 and butterflies, its main interest lies in his account of the 

 little-explored mountains of Air, that rise in massive, 

 barren, isolated groups out of the level monotony of that 

 part of the Sahara which borders on Northern Nigeria. 

 The author's expedition was undertaken in 1920 in the 

 interests of Lord Rothschild, and its object was to "link 

 up the chain of zoological geography across that portion 

 of Central Africa which lies between Algeria in Northern 

 Africa and Nigeria in West Africa." 



The heights of the various Air mountain groups range 

 from 3,000 to 5,000 feet. The author found the central 

 group, the Timia Mountains, the most beautiful and 

 fertile, in particular the Timia Gorge, about three or four 

 miles long, "through which the wide shallow river-bed 

 winds . . . while the steep slopes of the majestic heights 

 of Agolak and Timia mountains descend on either side to 

 its very margin, leaving, in places, narrow little stretches 

 of ground upon the banks, no wider than a mansion garden, 

 which are irrigated by means of wells and cultivated by 

 the natives to grow wheat and millet and maize, or bear 

 thick groves of date palms." The northern ranges, to 

 which the French authorities were far from wishing the 

 author to proceed, as they could not guarantee his safety, 

 are far more barren, more sparsely populated, and infested 

 with robber bands, with one of which Captain Buchanan's 

 party nearly came into collision. 



The total population of Air consists of 5,000 Tuaregs. 

 The account of this branch of an Arab-like Semitic race 

 that has interested anthropologists a great deal in recent 

 years makes one of the most interesting chapters in this 

 book. Captain Buchanan found them " the strangest 

 race I have ever come into contact with — independent, 

 haughty, daring, unscrupulous, and lazy in leisure, yet 

 fit to rank among the finest travellers and camel-riders 

 in the world." The men are of a slim, wiry build, while 

 the women, who do not usually reach more than five feet 

 in height, grow to a moderate stoutness in middle-age. 

 The men, and not the women, wear the yashmak, or face- 

 covering, which, though it is a Moslem custom, Captain 

 Buchanan considers has an eminently practical value as 

 well in protecting the face against sun-glare and sand- 

 storms. E. L. 



We regret that, owing to lack of space in this number, we 

 are obliged to reserve, for inclusion in the March number, 

 the considerable amount of correspondence that has 

 reached us. 



Books Received 



(Books mentioned in this column may or may not 

 be reviewed in this number, or in a later number.) 



CLASSICAL LITERATURE 



The Legacy of Greece. Edited by R. W. Livingstone. 

 (Oxford : Clarendon Press, vs. 6d.) 



MISCELLANEOUS 



Tkc Caloidar. Its History, Structure, and Improvement. 



By A1.EX.A.NDER Philip, LL.B., F.R.S. (Cambridge 



University Press, js. 6d.) 

 The Beginning of the Year in the Middle Ages. By 



Regin.\ld L. Poole. [From the Proceedings of thi 



British Academy, vol. x.] (Published for the British 



Academy by Humphrey Milford, Oxford University 



Press, 35. 6d.) 

 Up a/;aiiist it in Nigeria. By L^ng.\-Lang.^. With 47 



Illustrations. (London ; George Allen & llnwin, 



Ltd., 185.) 

 Oil. Its Influence on Politics. By Francis Delaisi. 



(The Labour Publishing Company, Ltd., and George 



Allen (<: Unwin, Ltd. Paper, 2s 6d. ; cloth, 3s. 6d.) 



PSYCHOLOGY AND PSYCHICAL RESEARCH 



The Psycho-Analytic Study of the Family. By J. C. 

 Flugel. (International Psycho-Analytical Press, 

 and George Allen & Unwin, Ltd., 105. 6d.) No. 3 

 of the International Psycho-Analytical Library, 

 edited by Ernest Jones. 



The Survival of the Soul and its Evolution after Death. 

 Notes of Experiments by Pierre-Emillf Cornillier. 

 (Kegan Paul, Trench, Trubner & Co., Ltd., io.t. 6;'.) 



SCIENCE 



Radiations from Slow Radium and their Therapeutic Value. 



By John B. Kramer. (Bailliere, Tindall & Cox, 



I2S. 6i.) 

 Patents and Chemical Research. By H. E. Potts, B.Sc. 



(Liverpool University Press, 8s. 6d.) 

 Rays of Positive Electricity, and their Application to 



Chemical Analysis. 2nd Edition. By Sir J. J. 



Thomson, O.M., F.R.S. (Longmans, Green & Co., 



16.?.) 

 A Te.rtbook of Geology. Vol. I, General Geology. Vol. II, 



Historical Geology. By Professor A. W. Grabou, 



S.B., S.M., S.D. (George G. Harrap & Co., 6|s.) 

 An Introduction to Applied Geography. By Alex.\nder 



Stevens, M.A., B.Sc. (Blackie & Son, Ltd., 65.) 

 Some Factors in Thermal Sanitation in the Tropics. By 



G. W. Grabham, M.A., F.G.S. [From the Journal 



of Hygiene, January 12, 1921.] (Cambridge : 



University Press.] 

 A Star Atlas and Telescopic Handbook. By Arthur 



P. Norton, B.A. (Edinburgh : Gall and Inglis, 



los. 6d.) 

 Astronomical Photography for Amateurs. By H. H. 



Waters. (Edinburgh : Gall ct Inglis, 6s.) 



