136 



NATURE 



[March 23, 191 1 



Pleurent .nnd Lucien LAvi : A method for ti 



detf'rniin.ition of the ash in the nnalysts of \'''- 

 anuJi.il iii.iii 1 i.ils, MM. Taffanel .mil Durr 



p.ir;il :\ . ' ;m1\ 



■ inlaislil,].. .l;isl, fi,,;n lli- . 

 Ktenan 



L. Cam : \ 



Snutli Am. I :. 

 and \ -<-• 

 rli(Mi> 



II Am 



Doyon, 



01 II 

 with 



on i 



in\ ii ~ 

 Bounhiol 



(If Stoocklin ; A 



Wolff in 



,,f ,1,. , ::,> l.l.M.il anil 



W . Nicati I ' 

 \'(' nil I I \ 



,.il (unclion (il ill' vi-ual an^l'-. J. P. 



\ h\.li,.<i\ n.iiiiii ihriiiv ol llir i)-..uil(>-niii4ra- 



. lumn ti-h (riiv)iiuis viili^aris) in ih'' Miiiil'i'- 



|. Dcprat : '\'\v- (l.-is-^ilii .niiin dl I'usilinr linn- 



( 'lin.i. 



Royal Society of Sciences. —The Nd,h:i.ht,ii (i.hy>.ico- 

 nialli. malical -rlioii), ])a|-l vi. for i-im, nml.iins ihr 

 following ;■'■!!'''- ' i>iinminiral''(l to ill'- -.imI.ix : 



M;i\ _>. li Hilbcrt ; Oiilli)!'- of a i;.|irral lli.orN of 

 inl.-:'..l • , 



I ' ' • Wallach : R'--arrli.- from llv 



(, , ( h'-mical laho: aii)r\ . \\i\-. ; |i) Kr- 



(lu. ;■;-:•. -'I mi>:iUn al'd cvilir alcohols; (.2) r.-diulion of 

 uns.iiui Ml' (1 k> t()ni>. 



.\i>\cml).r Jfi. W. VoiKt ; Chani^fs in coni'i-niiMt ion of 

 the sokilion of a ma^t^ni-ti-aMi- >alt in a ncin-homoi^' ii'nu- 

 magni'iii Th hi. 



D<'ccml)rr in. P. Furtwan^ler : R.s.anh.s on the 

 last of I'lTinai'- tlicon-in- and llv di\i~ion of \\\<- circle. — 

 J. Yoshikawa : Rounilar\ -valm- |)rohli'nis wiih ilin-c para- 

 motors. — J. Yoshikawa : A ihcornn in oscillaiions with 

 two parani'tors. — K. Hecke : Real quadratic i^roiips and 

 auionioi'pliic fiin<-lions. 



DIARY OF SOCIETIES. 



THURSDAY, March 23. 



Royal Society, at 4.30. — A Theory of Asymptotic Series: G. N. Wat.son. 

 — The Ionization of Heavy Gases by X-rays: R. T. Beatty. — The Varia- 

 tion of the Ionization with Velocity for the P-Particles : W. Wilson. — 

 The Causes of Absorption of Oxygen by the Lungs in Man : C. G. 

 Douglas and Dr. J. S. Haldane, F.R.S. — The Influence of Planets on 

 the formation of Sun-spots : Dr. A. Schuster, F.R.S. 



Royal Institution, at 3. — Giants and Pygmies : Prof. A. Keith. 



Institution of Electrical Engineers, at 8. — Electricity Meters widi 

 Notes on Meter Testing : H. A. Ratcliff and A. E. Moore. 



FRIDAY, March 24. 



Royal Institution, at 9. — The Sidereal Universe : Sir David Gill, 

 K.C.B., F.R.S. 



Physical Society, at 5.— (r) A Sensitive Thermo Regulator ; (2) Experi- 

 ments on the Measurement of Electrolytic Resistances using Alternating 

 Currents: Dr. H. F. Haworth. — (i) Oscillatory Currents in Coupled 

 Circuits; (2) Some Radio-telegraphic Apparatus in Use at the City and 

 Guilds (Engineering) Colle.ge : Prof. G. W. O. Howe. 



Institution of Civu. Engineers, at 8. — The Uses of Chemistry in 

 Engineering: James Swinburne, F.R.S. 



SATURDAY, March 25. 

 RovAL Institution, at 3. — Radiant Energy and Matter: Sir J. J. 



Thomson, F.R.S. 



MONDAY, March 27. 

 Royal Geographical Society, at 8. -50.— The New Geography: its Aims 



and Methods: H. J. Mackinder, M.P. 

 Royal Society of Arts, at 8. — Applications of Electric Heating : Prof. 



J. A. Fleming, F.R.S. 

 Institute of Actuaries, at 5. — State Insurance against Invalidity and 



Old Age— the Actuarial Basis of the Austrian Method : G. W. Richmond. 



TUESDAY, March 2S. | 



Royal Institution, ai ! r.uions of Ancient Desert Sites in ' 



Central Asia : Dr. M. A 

 Institction of Civil ^, at 8. — Fwther tiiscvssion : The 



Electrification of a Portion of the Suburban System of the London, 

 Brighton and South Coast Railway: P. Dawson. — Probable Papers: The 

 Improvement of Highways to meet Modern rondiiions of Traffic : J. W. 

 Smith. — Recent Development in Road-i 'construction and 



Maintenance: H. P. Maybury. 



IVEDNESDAY, March -> 

 Royal Society of Arts, at 8. — .'\rt Eiluc:uion in Jewellery, Goklsmiih- 



ing, and Allied Trades : G. B. Heming. 

 British Astronomical Association, at 5. i 



NO. 2160, VOL. 86] 



tation 1 c ■ 1 ; , ' • ' . ' 



Inter-relations of Genetic Fa', tori. ; \V. l;.tie»</(i, F.l: 

 Punneit. — A Ca»« of Gametic Couplinft in Pisum : 

 W. Bateson. F.K.S.-On (;:iin.iF (..ut.iin;: :.■.! !■: 

 sinensis : R. I 

 Royal Institi : 

 rations : Prof. \'. 



Royal In.stitution, ai , 



the Earth and above it : Prof. H. 

 Institi;tion op Civil Enginefj 



Engineering: J. Swi"' """• K ' 



Royal Institution, at 3— 1< 

 Thomson, F'.R.S. 



Appii 



>try « 



J J 



CONTENTS. 



A Criticism of the Darwinian Theory. By 



PAG! 



Sir 



W. T. Thiselton-Dyer, K.C.M.G., F.R.S. 

 Movement of Molecules. I'.y E. R. ...... 10; 



Medical Biology. By A. D icK 



Geological Essays. By G. A. J. C icl 



The Analysis of Synthetical Dyes lo; 



Domesticated Animals, liy R. L lo; 



Popular Science lol 



Our Book Shelf loJ 



Letters to the Editor: — 



The Flow of Thin Liquid Films. {Illuslr c 



W. G. Royal-Dawson ... 



Water-vapour on Mars. — Prof. Frank W. Very . i 

 The Fox and the Fleas.— Prof. T. McKenny 



Hughes, F.R.S i 



The Circulation of Air in the Southern Hemi- 

 sphere. By Dr. J. Hann i 



The Institute of Palaeontology i 



The Ethnology of Yoruba and Benin. {Illustrated.) 



By Sir H. H. Johnston, G. CM. G., K.C.B i 



High-frequency Generator for Wireless Telegraphy. 



By A. J. Makower i 



Reconstruction of the University of London ... 1 



The Fur-seals of Bering Sea i 



Prof. Jakob Maarten van Bemmelen. By W. B. H. i 

 Dr. John Attfield, F.R.S. By Prof. Henry G. 



Greenish I 



Notes I 



Our Astronomical Column : — 



The Sydney Observatory 12 



The Spectra of Spiral Nebulre and Globular Star 



Clusters 12 



The Dark Borders of the Martian Snowcaps .... 12 



Double-star Observations 12 



The " Anuario " of the Madrid Observatory .... 

 The National Physical Laboratory during 1910 

 Velocity of Earth Movements caused by the 



Messina Earthquake. By Prof. J. Milne, F.R.S. 12 

 The Ebro Observatory of Cosmical Physics. By 



M 12, 



Emotion and Morals ... 12 



Greek Lands and their People 121 



A Destructive Disease of Potatoes. By E. S. S. . 12 

 Professors and Practical Men. Bv Prof. Arthur 



Smithells, F.R.S '. 12 



Visual Sensations from the Alternating Magnetic 



Field i2< 



A Kinetic Theory of Gravitation. By Charles F. 



Brush 13' 



University and Educational Intelligence 13: 



Societies and Academies 13 



Diary of Societies i3' 



12 



12 



