476 



NATURE 



[August 3, 19 16 



Foarier-Bessel with several variables. — F. Arago : Con- 

 tribution ' to the experimental study of waves. — M. 

 Dussand : New experiments on the separation of the 

 luminous and calorific effects of a source of light. 

 The two lenses forming the optical system are 

 separated in such a manner that air can be circulated 

 between them. The heat effects are thus reduced to 

 a negligible quantity.— G. K. Burgess and H. Scott : 

 The thermo-electric measurement of the critical points 

 of iron. By the method described, which is a modifi- 

 cation of that used by MM. Boudouard and Le 

 Chatelier, both the Aj and A3 points are clearly shown 

 by pure iron (99968 per cent. iron). — J. M. Lahy : The 

 psycho-physiology of the machine-gunner. — L. Roule : 

 The migration of the tunny fish (Orcynus thymius).— 

 C. NicoUe : An attempt at preventive inoculation in 

 exanthematic typhus. 



July 17. — M. Ed. Perrier in the chair. — 

 The president announced the death of Elias 

 Metchnikoff, foreign associate, and gave an account 

 of his life-work. — G. Bigourdan : The renaissance of 

 astronomy at Paris, starting from the sixteenth 

 century. — A. Colson : Demonstration of the rational 

 character of the new solubility formulae. — E. Bourquelot 

 ■ and A. Aubry : The biochemical synthesis of a galacto- 

 biose. The synthesis was effected by the action of 

 emulsln upon an aqueous solution of galactose. 

 Although the product could not be obtained in the 

 crystallised state, it is shown that a galactobiose is 

 formed. — E. Teodoresco : The presence of a phyco- 

 erythrin in Nostoc commune. — J. Pavillard : Some new 

 flagellae, epiphytes of the pelagic diatoms. — G. 

 Bourguignon : A method of determining chronaxy in 

 man with the aid of condenser discharges. Classifica- 

 tion of the muscles of the superior member by the 

 chronaxy according to their radicular origins. — J. 

 Delphy :" Abdominal scoliosis in Mu^il auratus and the 

 presence of a parasitic myxosporidia in this fish. 



BOOKS RECEIVED. 



The Chemistry of the Garden. By H. H. Cousins. 

 Revised edition. Pp. xviii + 143. (London: Mac- 

 millan and Co., Ltd.) i«. 



Economical Dishes for Wartime. By F. A. George. 

 Ppj^ 48. (Birmingham : Cornish Bros., Ltd.) 6d. 



Jvlemoirs of the Connecticut Academy of Arts and 

 Sciences. Vol. v. The Collection of Osteological 

 Material from Machu Picchu. By G. F. Eaton. Pp. 

 96 + plates xxxix. (New Haven, Conn.) 



Cours de Manipulations de Chimie Physique et 

 d'Electrochimie. By M. Centnerszwer. Pp. vii+180. 

 (Paris : Gauthier-Villars et Cie.) 6 francs. 



Exercices et Legons de M^canique Analytique. By 

 R. de Montessus. Pp. ii + 334. (Paris: Gauthier- 

 Villars et Cie.) 12 francs. 



The Birds of Britain : their Distribution and Habits. 

 By A. H. Evans. Pp. xii + 275. (Cambridge: At the 

 Universitv Press.) 4s. net. 



A Shilling Arithmetic. By J. W. Robertson. Pp. 

 viii+191. (London: G. Bell and Sons, Ltd.) is. 



Revision Papers in Arithmetic. By C. Pendlebury. 

 Pp. xv + 68 + xviii. (London : G. Bell and Sons, Ltd.) 



I*- 



Department of Mines. Memoirs of the Geological 

 Survey of New South Wales. Ethnological Series. 

 No. 2 : i.. The Cylindro-Conical and Cornute Stone 

 Implements of Western New South Wales and their 

 Significance, ii., The Warrigal, or "Dingo," Intro- 

 duced or Indigenous? By R. Etheridee, jun. Pp. 

 vli -H 53 + plates xii. (Svdnev : W. A. Gullick.) 75. 6d. 



Les Allemands et la "Science. Bv Prof. G. Petit and 

 M. Leudet. Pp. xx + 375. (Paris: F. Alcan.) 3.50 

 francs. 



Fungoid and Insect Pests of the Farm. By F. R. 

 Petherbridge. Pp. vii+174. (Cambridge: At the 

 University Press.) 45. net. 



A Treatise on the Theory of Alternating Currents. 

 By Dr. A. Russell. Vol. ii. Second edition. Pp. 

 xiv + 566. (Cambridge : At the University Press.) 15s, 

 net. 



Combinatory Analysis. By Major P. A. MacMahon, 

 Vol. ii. Pp. xix + 340. (Cambridge: At the Univer- 

 sity Press.) 185. net. 



A Bibliography of British Ornithology. By W. H. 

 Mullens and H. K. Swann. Part ii. (London : Mac- 

 millan and Co., Ltd.) 6s. net. 



Hyperacoustics. By J. L. Dunk. Division I. 

 Simultaneous Tonality. Pp. vi + 311. (London: J. M. 

 Dent and Sons, Ltd.) 7s. 6d. net. 



The Danish Ingolf-Expedition. Vol. iii., Nos. 3 

 and 5. Crustacea Malacostraca. By H. J Hansen. 

 Pp. 145+12 plates + 1 chart, and a list of the stations, 

 and pp. 259+16 plates + 1 chart, and a list of the 

 stations. (Copenhagen : Bianco Luno.) 



A Treatise on the Circle and the Sphere. By Dr. 

 J. L. Coolidge. Pp. 602. (Oxford : At the Clarendon 

 Press.) 2 IS. net. 



Fermat's Last Theorem. By M. Cashmore. Pp. 

 63. (London: G. Bell and Sons, Ltd.) 2s. net. 



City and Guilds of London Institute. Department 

 of Technology. Programme for the Session 1916-17. 

 Pp. viii + 408. (London : John Murray.) gd. net. 



CONTENTS. PACK 



Ore-Deposits 457 



Napier and His Logarithms. By G. B. M 458 



An Agricultural Policy. By E. J. R 459 



Our Bookshelf 460 



Letters to the Editor:— 



Productive Work and Classical Education. — Sir 



Lauder Brunton, Bart., F.R.S 461 



Gravitation and Temperature.— Prof. E. H, Barton, 



F.R.S • 461 



The Gun-firing on the Western Front. —C. Welborne 



Piper 462 



Portraits of Wm. Smith.— T. Sheppard . . ... 462 



National Afforestation 462 



A National Statutory Board of Science and In- 

 dustry - 463 



The National Research Council of the United States 464 



Psychological Effects of Alcohol. By W. D. H. . . 465 



The Funeral of Sir William Ramsay 466 



Dr. J. A. Harvie-Brown 466 



Notes 466 



Our Astronomical Column :— 



Monochromatic Photographs of Planets 47 1 



The Polar Caps of Mars and Solar Radiation .... 47' 



Variable Stars near the South Pole ........ 47 1 



The Ipswich Conference of the Museums Associa- 

 tion 472 



Recent Zoological Research in South Africa. By 



Dr. A. D. Imms 47^ 



The Croydon Natural History Society 47: 



The Lake Villagers of Glastonbury. By Hon. Prof. 



W. Boyd Dawkins, F.R.S 473 



University and Educational Intelligence 47-^ 



Societies and Academies 47f 



Books Received 47' 



ST. 



Editorial and Publishing t)ffices : 

 MACMILLAN & CO., Ltd., 

 MARTIN'S STREET, LONDON, W.C 



Advertisements and business letters to he addressed to thi 

 Publishers. 



Editorial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number: Gerr.^rd 8830. 



NO. 2440, VOL. 97] 



