4o8 



NATURE 



[December i8, 1919 



proportion of reducid hsemoglobin in the blood. In 

 the paper the results are given of investigations in- 

 volving determinations of the owgen capacity and 

 degref" of oxygen saturation of the venous blood of 

 persons suffering from pneumonic influenza ; in some 

 cases the acidity and reactivity were determined bv 

 means of the hydrogen electrode. The samples of 

 venous blood from cases of pneumonic influenza 

 showed no indication of decreased exygen capacitv 

 or of deficient oxygenation. The concentration of 

 hydrogen ion produced by the addition of a measured 

 quantity of acid showed no indication of acidosis; the 

 alkaline reserve was not reduced. — Dr. R. J. Tillyard : 

 The Panorpoid complex. Part 3 : The wing-venation. 

 .\mongst the new discoveries mav be mentioned the 

 proof that the basal cell of the forewing in the butter- 

 flies is an areocel of very specialised construction, and 

 that all the higher groups have had the venation of 

 the anal area of the hindwing reduced, not bv loss of 

 3A, as hitherto supnosed, but b\ loss of i.\ after 

 fusion with 2.-\ to form a Y-vein. A sunimarv !•; 

 given of the phylogenetic results, and a phvlogenetic 

 table with the nositions of the more imnortant fossils 

 marked along the lines of descents. The Trichootera 

 and Lepidoptera are shown to b'^ ver\- closelv allied, 

 being a true dichotomy from a common ancestral 

 stem, probably in the Trias. The Megalootera and 

 Planipennia are even more closely allied, and can onh- 

 doubtfully be kept as separate orders. The Dintera 

 are traced back to the Triassic Paratrichoptera, them- 

 selves an early offshoot of the older Mecooterous stem. 

 The three orders Mecoptcra, Paratrichoptera, and 

 Diotera difl'er from all the rest in having the cubitus 

 only two-branched, and thus lie outside the main lin.- 

 of advance of the comolex. 



BOOKS RECEIVED. 



Calculation of Electric Conductors. By W. T. 

 Taylor. Pp. 34. (London : Constable and Co., Ltd.) 

 10.S. 6d. net. 



The Present Position of the Theory of lonisation. 

 Pp. 178. (London : The Faraday Society.) 12^. 6d. 



.\ction de la Chaleur et du Froid : Sur r.\ctivit(5 

 des Etres Vivants. By G. Matisse. Pp. ii+!;6. 

 (Paris: E. Larose.) " ' 



The Theory of Relativitv. By H. L Brose Pp -2 ' 

 (O-xford : B. H. Blackwell.) is. 6d. net. 



Timbers and their Uses. By VV. Winn. Pp. vii-h 

 333. (London : G. Routledge and Sons, Ltd ) 

 10.?. 6d. net. ' 



The Adventurer's Handbook : Being the Manual 

 of the Order of Woodcraft Chivalry. Pp. xiv-|- 1 iq 

 (London: The Swarthmore Press, Ltd.) 2s. 6d. net' 



The Hill of Vision : A Forecast of the Great War 

 and of Social Revolution with the Coming of the New 

 Race. By F B. Bond. Pp. xxv+it,^'. (London: 

 Constable and Co., Ltd.) ys. 6d. net. 



The Coal Consumption of Power Plants, and 

 Bonuses for Coal Saving. Bv R. H. Parsons Pp 2" 

 (London : The Electrical Review, Ltd.) 1.9. net "' ' 



Musings of an Idle Man. Bv Sir R. H Firth ! 

 Pp. xii + :,5g. (London : John Bale, Ltd.) rs 6d' I 

 net. ' ( ■ ■ I 



Engineering Descriptive Geometry and Drawing | 



By Capt. F. W. Bartlett and Prof." T. W. Johnson I 

 3 parts. Pp. vii-f2o6; v-l- 207-374- v + T^y'-<Sjy 



(New York : John Wiley and Sons, Inc. ; London • 1 



Chapman and Hall, Ltd.) 27s. 6d. net. | 



The Psychology of the Future. Bv E. Boirar. '' 



Translated and edited, with an introduction, by W de 1 

 Kerlor. Pp. xiii-l-322. (London: Kegan Paul and 



Co., Ltd.) 10.S. 6d. net. | 



NO. 2616, VOL. 104] 



Pictorial ."\tlas of English History. Arranged bv 

 ]■'.. J. S. Lav. Pp. 48. (London : Macmillan and Co^ 

 Ltd.) I.?. 6d. 



I'^xperiments with Plants. By J. B. Philips. 

 Pp. 207. (Oxford : .\r the Clarendon Press."* -jv. 

 net, 



DIARY OF SOCIETIES. 



THURSDAY', Deckmuek iS. 

 RoVAL Society- of Akt , at 4.30.— P. J. Hartog : Some Problems of 



Indian Education. 

 Royal Society of Mf.dicine (Dermatology Section), at 5. 

 KovAL Institute of Public Hf.alth, at 5.— Dr. ]. D. Grant: 'luber- 



culosis of the Larynx : Treatment, e«ipecially in the Home. 

 Institution of Mining and Mf.i allurgv (at Geological .Society), at 



5.30. — Adjourned Discus.sion on A Contribuiion to the Study of Flotation, 



H. L. Sulman. 

 Institution of Electrical Engineers (at Institution of Civil Engineers) 



at 6. — D. M. W. Hutchison and W. J. Wayte : Electricity in Tin 



Mining. 

 Concrete Institute, at 7 30. — M. S. R. Adams : The Use of Elliptical 



Vaulting as a Primary Factor in Contemporary Architecture. 

 Society of Architects, at 8. — Prof. H. Adams: The Need for More 



Care in Warehouse Design. 

 Aristotelian Society (at 22 .Albemarle Street), at 8.— Dr. G. E. Moore : 



("xternal and Internal Kelaiions. 

 Chemical Society, at 8. — Prof. J. Walker : War Experiences in the 



Manufacture of Nitric Acid and the Recovery of Nitrou.s Fumes. 

 FRIDAY, December ig. 

 Institution of Mechanical Engineers, at 6. — G. W. Burley : Cutting 



Power of Lathe Turning Tools, Part II. 

 Junior Institution of Engineers (at Royal United Service Instuition), 



at ■j,^o. — Sir E. Tenny-son d'Eyncourt : The Influence of the W^r on 



Engineering (Presidential Address). 

 Royal Society of Medicine (Electro-therapeutics Section), at 8,30. — 



Dr. J. C. Mottram : The Leucocytic Content in Radium Workers. 



— Adjourned Discussion on Major Cooper's Paper : The Artificial 



Stimulation of Mu>cle, with Demonstration of a New Form of Faradic 



Coil. 



SATURDAy, December 20. 

 PHVSioi.ofin Ai. Society (at St. Thom.is's Hospital), at 4.30. 



CONTENTS. PAGE 



Physiology and Medicine. By Prof. W. M. 



Bayliss, F. R.S. . 389 



Mathematics, Particular and General. By Dr. S. 



Brodetsky 390 



Our Bookshelf ... 391 



Letters to the Editor: — 



Power from the Sun. — A. A. Campb:ll Swinton, 



F.R.S 392 



Heat of Reaction and Gravitational Field. — Prof. 



F. G. Donnan, F.R.S 392 



A Helium Series in the Extreme Ultra-Violet. — 



Prof. W. M. Hicks, F.R.S 393 



The Constitution of the Elements. — Dr. F. W. 



Aston 393 



The Deflection of Light during a Solar Eclipse. — 

 W. H. Dines, F. k'.S. ; Lewis F. Richardson ; 



Prof. Alexr. Anderson 393 



Einstein's Relativity Theory of Gravitation. III. 

 The Crucial hhenomena. By E. Cunningham . 394 



The Inheritance of the Naval Officer 396 



Notes .... 396 



Our Astronomical Column :— 



The December Meteoric Shower 400 



Discussion on Relativity 400 



Flotation Principles of Ore Extraction 401 



The British Association at Bournemouth : — 



Section L — Educational Science — Opening Address 

 (Abridged) by bir Napier Shaw, LL. D. , Sc.D., 



F.R.S., President ot the Section 401 



University and Educational Intelligence . . 405 



Societies and Academies 406 



Books Received . . 408 



Diary of Societies ... . .... 40S 



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.Advertisements and business letters to he addressed to the 



Publishers. 



Editorial Communications to the Editor. 



Telegraphic .iddress : Phusis, London. 

 Telephone Number : Gerrard 8830. 



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