28 



NATURE 



[March 2, 191 6 



Examples in Magnetism for Students of Physics 

 and Engineering. By Prof. F. E. Austin. Second 

 edition. Pp. 90. (Hanover, N.H. : Prof. F. E. Aus- 

 tin; London : E. and F. N. Spon, Ltd.) i dollar 

 10 cents. 



A New Table of Seven-Place Logarithms of all 

 Numbers from 20 000 to 200 000. By E. Sang. Pp. 

 xviii + 36s. (London : C. and E Layton.) 21s, net. 



Department of Commerce. U.S. Coast and Geo- 

 detic Survey. Geodesy. Application of the Theory 

 of Least Squares to the Adjustment of Triangulation. 

 By O. S. Adams. Pp. 220. (Washington : Govern- 

 ment Printing Office.] 



State of Connecticut. Public Document No. 24. 

 Thirty-eighth Annual Report of the Connecticut Agri- 

 cultural Experiment Station, 1914. Pp. xiv + 448. 

 (Hartford, Conn.) 



The Endocrine Organs : an Introduction to the 

 Study of Internal Secretion. By Sir E. A. Schafer. 

 (London : Longmans and Co.) los. 6d. net. 



Scientific Papers. By Sir G. H. Darwin. Vol. v.. 

 Supplementary Volume containing Biographical 

 Memoirs. By Sir Francis Darwin and Prof. E. W. 

 Brown. Lectures on Hill's Lunar Theory, etc. 

 Edited by F. J. M. Stratton and J. Jackson. Fp. 

 lv + 8i. (Cambridge: At the University Press.) 65. 

 net. 



Elements of Mineralogy. By F. Rutley. Revised 

 by H. H. Read. Nineteenth edition. Pp. xxii + 3g4. 

 (London : T. Murby and Co.) 35. 6d. net. 



The Tribes and Castes of the Central Provinces of 

 India. By C. V. Russell, assisted by Rai Bahadur 

 Hira Lai. Four vols. Vol. i., pp. xxv + 426. Vol. ii., 

 pp. xi + 540. Vol. iii., pp. xi + 589. Vol. iv., pp. 

 xi + 608. (London : Macmillan and Co., Ltd.) 42s. 

 net. 



The Homeland Handbooks. Penzance and the 

 Land's End District. Edited by J. B. Cornish and 

 J. A. D. Bridger. Pp. 123. (London : Homeland 

 Association, Ltd.) 6d. net. 



Manuals of Chemical Technology, vi.. The Salt 

 and Alkali Industry, including Potassium Salts and 

 the Stassfurt Industry. By Dr. G. Martin, S. Smith, 

 and F. Milsom. Pp. viii + ioo. (London: Crosby 

 Lockwood and Son.) 7s. 6d. net. 



DIARY OF SOCIETIES. 



THURSDAY, March 2. 



RovAL Society, at 4.30. — The Antiseptic Action of Substances of xh'. 

 Chloramine Group: J. R. Cohen. H. D. Dakin. M. Uaufresne and 

 J. Kenvon.— The Structure of the Dicynodont Skull: I. J. B Sollas and 

 Prof. W. I. Solla-.— Analyses of Agricultural Yield. Fart III. The 

 Influence of Natural Environmental Factors upon the yield of Egyptian 

 Cotton: W. L. Balls.— The Function of Chlorophyll, Carotin and 

 XanthopSyll : A. J. Ewart. 



RovAi Institution, at 3. — Recent Excavations in Me&opotomia — The 

 Northern Capitals, Nineveh and Asshur: Prof L. W. King. 



Child Study Society, at 6. — The Danish Child at School: A. E.Hayes. 



LiNNEAN SOCIETY, at 5. — Exhibit of Giardia (Lainhlia) ititestinalis from 

 casts of Diairhoea in Soldiers, the Inleciions being coniracted in Flan- 

 ders: Dr Annie Porter. —Larval and Post-Larval Stages of Jasiis 

 lalandii : Dr. J. D. F. Gilchrist.— The August Heleoplaiikton of some 

 North Worcester-hire Pools: B. Millard Griffiths. — The Distribution of 

 the Hox-tree, Buxus sempervirens : Dr. Otto Stapf. 



FRIDA Y, March 3. 



Royal Institution, at 5.30.— Corona and other Forms of Electric Dis- 

 charge : Prof. S. P. Thompson. 



Geologists' Association, at 7.30.— The Oil-fields of Trinidad : V. C. 

 Tiling. 



MOIVDA Y, March 6. 



RoYAi. Geographical Society, at 8.30.— Some little-known Polynesian 

 Settlements near the Solomon Islands : Charles M. Wo.idJord. 



Aristotelian Society, at 8. — Sense-Data and the Ph>sical Object: 

 Prof. T. Percy Nunn. 



Society op Chemical Industry, at 8. 



SociETVOF Enginbf.rs, at 5.30. — Sewage and iiE Precipitation : R. Brown. 



TUESnAV, March 7. 

 RovAL Institution, at 3. — Th*r Plant and the Soil-r— Man's Control: 



Dr. E. I. Russell. 

 Zoological Society, at 5.30. — Kinematographs of African Animals : 

 H. K. Eustace. 



Institution- of Civil Enginebks, at 5.30. — Induitrial Development :; 

 Harold Cbx. .... 



RoNiGKN iioc\JS.T\, , al ■&.ii.-rA<ijoumed Difcuasiau: The Injurioasi 

 Effects produced by X-rays. — 'Ihe Use of Inverse Current: A. C. Gun- 

 stone. 



iVEDNESDAY. March 8. 



Geological Society, at 5.39. — P'ossil Insects from the British Coal 

 Measures : H. holton. 



Royal Society of Arts, at 4.30.— Optical Appliances in Warfare ; C. 

 K. Darling. 



THURSDAY, March 9. 



Royal. Society, at 4*30. — Probable Papers : The Distribution of Intensity 

 in Broadened Spectrum Lines: Prof. J. W. Nicholson and T. R. Mertoa. 

 — Prof. Joly's Meibod of avoiding Collision at Sea: Prof.' H.' C' 

 Plummer. • . , , ' 



Royal Institution, at 3.— Recent Ex,cavations in Mesopotamia— The 

 Southern Capital, Babylon : Prof. L. W. King. 



Lnstitution flF Electrical Engineers, , at 8.— Continuous-current Rail- 

 way Motors : E. V. Pannell. 



Optical Society, at 8.— A Simple Focometer for the Determination of 

 Short Focal Lengths both Negative and Positive : 'X'. F. Connolly.— The 

 Manufacture and Testing of Prisniaiic and other Compas.ses : F. E." 

 Smith. 



FRIDAY, March 10. 



Royal Institution, at 5.30.— Illusions of the Upper Air : Sir Napier 

 Snaw. 



Royal Astronomical Society, at 5. 



SATURDAY, March ii. 



KoVAL Institution, at 3. — Radiations from Atoms and Electrons: Sir 

 J. J . Thumfion. 



CONTENTS. PAGE 



The New Zealand Flora i; 



New American Steam Tables Z: 



Our Bookshelf > 



Letters to the Editor : — 



Exploration in South- West Africa.— Prof. W. A. 



Heidman, F.K.S.; Piof. H. H. W. Pearson . 4. 



Science and the State.— Prof. J. B. Cohen, F.R.S. 5; 

 Altitudes of Aurora;. {H^M Diagram.) — Prof. Carl 



Stdrmer 5. 



Ground Rainbows. {Wil/i Dmgram.)— A.. K. Heath 5. 

 The Application of Scientific Methods to the Im- 

 provement of the Sugar Beet. ( J-VtlA Diagram. ) 



By W. A. D. . ..... 6- 



The Recent Mortality Among Bees. By F 7 



Anthropology and Fauna of the Chad Basin. By 



Sir a. H. Johnston, G.C.M.G., K.C.B 9 



Prof. Ivan Petrovitch Pavlov. By W. H. T 9 



Sir Laurence Gomme. By Dr. A. C. Haddon, F.R.S. 11; 



Notes i^ 



Our Astronomical Column :— 



A New Comet '7 



Comet 1915a (Mellish) . ^T' 



U.S. Naval Observatory, 1915 ^T. 



A Daylight Meteor 17 



A Transneptunian Planet I7 



Artificial Irrigation in the Western States of North 



America. By B. C '7 



Some Recent Studies on Protozoa and Disease . . iS. 



The New Zealand Institute. By A. D 19 



Therapeutic Action of Ultra-Violet Rays . . . - 19 

 The Utilisation of Peat, (/i/nslra/ed.) By G. FletchtT 



and Prof. G. T. Morgan, F.R.S 19 



University and Educational Intelligence 24 



Societies and Academies ^5 



Books Received ^7 



Diary of Socioiies 281 



ST. 



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 MACMILLAN & CO., Ltd., 

 MARTIN'S STREET, LONDON, W.C. 



Advertisements and business letters to be addressed to th*^ 

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Editorial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number : Gerrarp 8830. 



NO. 2418, VOL. 97] 



