11^ 



NATURE 



[August 4, 192 1 



Canada. — Dr. L. V. King : Some new formulae for 

 the direct numerical calculation of the coefficient of 

 mutual induction of coaxial circles. A new high- 

 frequency vibration galvanometer. The photographic 

 recording and measurement of radio-telegraph signals. 

 A new lecture-room illustration of atomic models. — 

 Prof. J. C. McLennan : The refractive indices of 

 metallic vapours. — ^W. W. Shaver : The absorption 

 spectra of liquid and gaseous oxygen. — Prof. J. C. 

 McLennan and P. Lowe : The structure of the Balmer 

 series lines of hydrogen. — Prof. J. C. McLennan and 

 P. A. Petrie : The spectra of helium, hydrogen, and 

 carbon in the extreme ultra-violet. — Prof. J. C. 

 McLennan : The liquefaction of hydrogen.— W. A. 

 Lawrence ; Nitrophthalic anhydrides and acetylamino- 

 phthalic anh3drides with toluene and aluminium 

 chlorides, — H. N. Stephens ; Bromophthalic anhydrides 

 with benzene and aluminium chloride. — N. A. Clark : 

 The effect of certain chemicals on the rate of repro- 

 duction of yeast. — Prof. J. B. Ferguson and G. A. 

 Williams : The passage of hydrogen and of helium 

 through silica tubes.- — W. B. Leaf : The action of 

 methyl-green on yeast. — K. L. Wismer : Pressure- 

 volume relations of superheated liquids. — W. H. 

 Martin : Scattering of light by dust- free liquids. — Prof. 

 F. B. Kenrick : Note on Wolski's paper on optically 

 empty liquids. — Prof. J. B. Ferguson : Re-determina- 

 tion of the melting point of sodium chloride. — Prof. 

 W. L. Miller : Researches in physical and organic 

 chemistry carried out in the chemical laboratory of 

 the University of Toronto.— Dr. J. C. Glashan : The 

 reduction of the circulants to polynomial form with 

 applications to the circulants of the 7th and nth 

 degrees. — Prof. A. H. S. Gillson : The gravitation 

 potential of an anchor ring. .Some tidal problems. — 

 Prof. E. F. Burton and Miss E. S. Bishop : Law of 

 distribution of particles in colloidal solutions. — S. 

 McLean : Production of heat during charcoal absorp- 

 tion.— Prof. E. F. Burton and E. D. Mclnnes : The 

 relation between coagulative power of electrolytes and 

 concentration of colloidal solutions. — Dr. J. S. Plas- 

 kett : The radial velocities of 570 stars. The orbit 

 and dimensions of TV Cassiopeiae. The temf>erature 

 control of the stellar spectrograph. — W. E. Harper : 

 The orbital elements of the brignter components of 

 Boss 4Q7. The orbits of spectroscopic components of 

 Ross 4622. — H. H. Plaskett : The intensity distribution 

 in typical stellar spectra. ^ — Dr. S.- D. Killam : The 

 solution of plane triangles by nomograohic charts. - 

 Dr. C. T. Sullivan : Note on the geometrical equi- 

 valence of certain invariants. — Dr. W. B. Dawson . 

 The interpolation of breaks in tide curves for record- 

 ing gauges. -Dr. F. T. Shutt and Miss A. H. Bur- 

 wash : The vertical movement of alkali under irriga- 

 tion in heavy clay soils. Notes on the nature of 

 burn-outs. — Prof. H. F. Dawes: Reversible pendulum. 

 — Prof. .A. L. Hughes : Characteristic X-rays from 

 boron. — Prof. J. Satterly : A new experiment in vibra- 

 tion. — Prof. J. C. McLennan : Note on the spectrum of 

 potassium. Note on infra-red specti oscopy.^ — H. J. C. 

 Ireton : Selected radiation emitted by specially excited 

 mercurv atoms. 



Books Received. 



University of Illinois : Engineering Experiment 

 Station. Bulletin No. 120. Investigation of Warm- 

 air Furnaces and Heating Systems. By Prof. A. C. 

 Willard and others. Pp. 145, (Urbana : University 

 of Illinois ; London : Chapman and Hall, Ltd.) 



Ministry of Agriculture, Egypt : Cotton Research 

 Board. First Annual Report, 1920. Pp. 124. (Cairo.) 

 P.T.io. 



NO. 2701, VOL. 107] 



A History of British Mammals. By G. E. H. 

 Barrett-Hamilton and M. A. C. Hinton. Part xx. 

 Pp. 649-96-1-2 plates. (London : Gurney and Jack- 

 son.) 3s. 6d. net. 



Tychonis Brahe Opera Omnia. Tomi Quinti. 

 Fasciculus Prior. Astronomiae Instauratae Mechanica 

 (1598). Pp. 213. (Kobenhavn : Gyldendalske Bog- 

 handel.) 



Ministry of Public Works, Egypt. Report on a 

 Method of Measuring Small Differences in Longi- 

 tude. By E. B. H. Wade and P. A. Curry. (Physical 

 Department Paper No. 5.) Pp. 10, (Cairo : Govern- 

 ment Press.) P.T.5. 



Union of South Africa : Department of Agricul- 

 ture. Report with Appendices for the Year ended 

 March 31, 1919. (Exclusive of the Section relating 

 to Agricultural Education.) Pp. iv-l- 170. 75. 6d. 

 Report with Appendices for the Fifteen Slonths from 

 April I, 19x9, to June 30, 1920. Pp. 77. 4s. (Cape 

 Town.) 



Board of Education, South Kensington. Classifica- 

 tion for Works on Pure and Applied Science in the 

 Science Library, the Science Museum. Second edi- 

 tion. Pp. 243. (London : H.M. Stationery Office.) 

 i8s. net. 



Department of Statistics, India : Agricultural 

 Statistics of India, 1918-iq. Vol. ii. : Area, Classi- 

 fication of -Area, Area under Crops, Livestock, Land 

 Revenue Assessment, and Transfers of Land in 

 Certain Indian States. (Thirty-fifth issue.) Pp. v-H 

 131. (Calcutta : Government Printing Office.) 

 I rupee. 



The Journal of the Royal Agricultural Society of 

 England. Vol. Ixxxi. : Practice with Science. Pp. 

 278-1- clxiv. (London : J. Murray.) 155. 



CONTENTS. PAGE 



Modern Credulity . . 705 



Education and World Citizenship. By J. C. M. G. 707 



Practical Chemistry . . 708 



The Nature of Man. By W. J. Perry 710 

 Principles and Practice of Psychotherapy. By 



Alfred Carver ... 711 



Torres Strait and its Echinoderms By F. A. B. . 712 



Our Bookshelf ... 712 



Letters to the Editor:— 



The "Flight" of Flying-fish.— H. H. Clayton . . 714 

 The Colours of Breathed-on Plates. — Prof. C. V. 



Raman ... .... . 714 



Mutations and Evolution. — Prof. R. Ruggles 



Gates; The Writer of the Article ... 714 



Molluscan Fauna of Scottish Lakes, and a Pisidium 



New to the British Isles. — B. B. Woodward . . 715 



Cup and Ring Markings. — C. Carus-Wilson . . . 715 



Science and Civilisation. — Dr. C. V. Drysdale . . 715 

 Remarks on Simple Relativity and the Relative 

 Velocity of Light. I. By Sir Oliver Lodge, 



F.R.S 716 



Endowment of Scientific Research in the United 



States 719 



Obituary 720 



Notes ... .... 722 



Our Astronomical Column : — 



Displacement of Lines in the Spectrum of Venus . . 725 



Planetary Photography . . . 725 



Measurement of the Diameter of Arcturus 725 



The Universities and Technological Education. 



By Prof. W. W. Watts, F.R.S 726 



The Exploitation of Irish Peat. {Illuslraied.) By 



Prof. Hugh Ryan 728 



Geophysical Problems 730 



Agricultural Research ... 731 



Meteorology of the Philippines. By C. H 732 



University and Educational Intelligence . ... 732 



Calendar of Scientific Pioneers 734 



Societies and Academies 734 



Books Received 736 



