9^ 



NATURE 



[March r8, 19-20 



Junior Institution op Engineers, at 7.30. — \V. H. F. Robba: Ship- 

 building and Sh'pping Developmen s in Italy, 

 RovAi, Society ok Medicine (Electro-Therapeutics Section), at 8.30.— 

 Dr. A. E. Barclay and Others : Discussion on Radium-Therapy and Radio- 

 , Therapy of Exophthahnic Goitre. — Dr. S. Russ: Vision by Ultra-violet 

 .Light. 

 Royal Institution of Great Britain, at 9.— E. McCurdy : Leonardo 

 da Vinci. 



SATURDAY, March 20. 

 Royal Institution or Great Britain, at 3. — Sir J. J. Thomson: 



Positive Rays 

 Physiological Society (at University College), at 4.— J. F. Donegan 

 and Others : Innervation of Veins. 



MONDAY, March 52. 

 Aristotelian Society fat 74 Grosvenor Street, W.i), at S.—C. C.J. Webb: 



■Obligation, Autonomy, and the Common Good. 

 Mrdical Society ok London, at 8.30.— E. M. Little and Others : 



Discussion on the Re-education of the Amputated. 

 RovAL Geographical Society (at Philharmonic Hall), at 8.3o.^Sir 



Ernest Shackleton : The 1914-1917 Antarctic Expedition. 



TUESDAY, March 23. 



Royal Anthropologics. Institute andPrehistokic Society of East 

 Anglia ( loint Meetings) (at Geolocical Society), at 3. — I he Prehistoric 

 Society of East Anelia. — Prof. J. E. Marr: Man and the Glacial Period 

 (Presidential Address) — H. Dewey.: Flat-based Celts from Kent, Hamp- 

 shire, and Dorset. — Dr. A. E. Peake : Exhibit bf Specimens found at 

 Grime's Graves in 1919. 



RoVal Horticultural Society, at 3. — Rev. J. Jacob: Wandering down 

 Old Garden By-roads. 



Royal Institution of Great Britain, at 3. — Prof. A. Keith : Briti.sh 

 Ethnology— The Invaders of England. 



Royal College of Physician.s, at 5:— Sir John R. Bradford : The 

 ('lini :al Experiences of a Physician during the Campaign in France and 

 Flanders, 1914 1919 (Lumleian Lecture). 



Institution of Civil Enuinkers, at 5.30 — Col. D. Lyell: The Work 

 done by Railway Troops in France during 1914-1919. 



Royal Anthropological Institute and Prehistoric Society of East 

 Anglia (Joint Meetings) (at Geological Society), at 6.— Prof. A. Keith: 

 How Far Cranial Characters can Help in Estimating the Antiquity of 

 Human Remain^. (Lantern.) 



Royal Photographic Society of Great Britain ( Technical Meeting), 

 at 7. — Dr. B. Glover; Factorial and Time Methods of Development 

 applied to Bromide and Gaslight Papers : Theoretical Principles and 

 Practical Demonstrations. 



Faraday Society (at Ctiemical Society), at 7.30. — General Discussion :— 

 Basic Sags : Their Production and Utilisation in Agricultural and other 

 Industries. Prof. F. G. Donnan will preside over the discussion. — 

 Dr. E J.. Russe.ll will oren the discussion and give a general survey of 

 the subject. — Prof. C. H Desch will riiscuss the subject from the Physico- 

 Cheniical Standpoint. — Sir T. H. Middleton : The National Aspects of 

 the Ca.se for Increasing the Supplies of Basic Slag. — Sir A. Daniel Hall: 

 The Demand for Basic Slag. — Prof. D. A.Gilchrist: Basic Slag and its 

 Place in the Developni'-nt of Agriculture. — G. Snott Robert.son : A Com- 

 parison of the Effect if various Types of Open-hearth Basic Slag on. 

 Grassland.— Dr. J. E. Stead, F. Bainbridge, and ¥.. W. Jackson : Papers 

 on Solubility of Basic Slags. — D. Sillars : The Formation of Basic Slag 

 in the Manufacture of Steel — W. S. Jones ; The Improvement of Low- 

 grade Basic Slag. 



WEDNESDAY, March 24. 



Institution of Naval Architects (at Royal Society of Arts), at 11. — 

 The Earl of Durham : Presidential Address — Sir Eustace D'Eyncourt 

 H.M.S. I/oo'^.—A. W. Johns : German Submarines — G. S. Baker : Mode 

 Experiments in Connecti )n with Submarine Warfare. 



Association op Ec nomic Biologists (General Meeting) (in Bot.tny 

 School of ihe Imperial College of Science and Technology), at 11.30. — 

 Short Communications and Exhibitions —D. W. Cuiler: The Relation 

 of Protozoa to Soil Problems. — Winifred E. Brenchley : Correlation 

 between Seed and Crop. — At a.i?. — Dr. W. Lawrence Balls : The Nature 

 and Scope of Botanical Research in the Cotton Indu.itry. — M. C. Rayner : 

 The Caicifuge Habit in Ling (Crt /««« OK/^ir/.r) and other Ericaceous 

 Plants.-H. Wormald: Shoot Wilt of Plum Tree«. 



Royal Society of Arts, 314.30. — L. Gaster : Industrial Lighting in its 

 relation to Efficiency. 



Geolo(;ical Society of London, at 5.30.— Mrs. E. M. Eeid: Two Pre- 

 Glacial Floras from Castle Eden, Durham, and a Comparative Review of 

 Pliocene Floras, ba^ed on the Study of Fossil Seeds. 



Psychological Society (Industrial Section) (at h xamination Po ms of 

 the Royal College of Physicians, 8-1 1 Queen Square, W.C. 1), at 6. — 

 Miss G. Broughton : The P.sychological Causes of the Wastage of Labour 

 in Factories employing Women. 



THURSDAY, March 25. 



In.stitution of Naval Architects (at Royal Society of Art.s), at 11. — 

 Sir Alfred Yarrow : Notes on our Economic Position as a Shipbuilding 

 CJountry. — J. Anderson: Further Notes on the Dimensions of Cargo 

 .S:eamers. — Dr. J. Bruhn : Freeboird and Strength of Ships. 



Institution ok Naval Architects (at Royal Society of Arts), at 3. — 

 P. R Jackson: The Stabilisation of Ships by means of Gvroscope>.— 

 Prof. K. Suyehiro : Yawing of Ships caused by Oscillation amongst 

 Waves. 



Royal Institution of Great Britain, at 3. — Stephen Grahim : The 

 Hope for Russia. 



Roval Society, at 4.30. — Probable Papers'. Prof. A. R. Forsyth: Note 

 on the Central Differential Equation in the Relativity Theory of Gravi- 

 tation. — R. D. Oldham: The Frequency of Earthquakes in Italy in the 

 Years 1896 to 1914. ^ A. F. Dufton : A New Apparatus for Drawing Conic 

 Curves. — Capt. J. W. Bispham : An Experimental Determination of the 

 Distribution of the Partial Correhtion Coefficient in Samples of 30. 



CiiE.MiCAL Society (Annual General Meeting), at 5. - Sir James J, Dobbie : 

 Presidential Address. 



Royal College of Physicians, af 5.— Sir John R. Bradford : The 

 Clinical Experiences of a Physician during the Campaign in France and 

 Flanders, 1914-1919 (Lumleian Lecture). 



Child-Stuuy Society (at Royal Sanitary Institute), at 6. — Dr. K. Sloan 

 Chesser: Adolescence and the Continuation Schools. 



IN.STITUTIONOF Electrical ENGiNEERs(at institution of Civil Engineers), 

 at 6 — Discussion on :— (a) The Electrical Eijuipment of Artisan Dwell- 

 ing* ^with Introductory Paper by L. Milne), (b) The Report of the 

 Karthiiig Sub-Committee of the Wiring Rules Committee of the Insti- 

 tution. 



Institution of Naval Architects (at Roval Siiciety of Ar's), 317.30. — 

 C. I. R. Campbell and C. H. May : The Kffect of Size upon Performance 

 of Rigid Airships. — Prof. E. G. Coker and A. I.. Kemball, jun. : The 

 Effects of Holes, ('racks, and other Discontinuities in Ships' Plating. 



Chemical Society (Informal Meeting), at 8. 

 FRIDAY, March 26. 



Institution of Naval Architects (at Roval Society of Arts), at 11. — 

 Eng.-t om. H B. Tostevin : Experience and Practice in Mechanical Re- 

 duction Gears in Warships. — J. J. King-Salier: The Balancing of Rotors 

 and Determining the Position and Am lunt of ihe Balancing Weiijhts. — 

 Prof. T. H. Havelock: Turbulent Fluid Motion and S'-in Friction. 



Physical Societv of London, at 5. — Prof. A. S. Eddington and Others : 

 Discussion on Einstein's Theory of Reativity. 



Wireless Society of London (at Institution of Civil 5;ngineers\ at 6.— 

 Capt. L. A. T. Broad wood : Harmonics in Coniinuous Wave Transmissions 

 (Illustrated by Lantern Slides and Experim-nts). 



Institution of Mi'Xhanical' Engineehs (Informal Meeting), at 7. — 

 ,P. L. Young and Others : Discussion on Foundry Memories. 



RovAL Institution of Great Britain, at 9.— Sir J. J. Thomson : The 

 Scientific Work of the late Ihe Right Hon. Lord R.iyleigh. 

 SATURDAY, March 27. 



Royal Institution of Great Britain, at 3. — Sir J. J. Thomson : 

 Positive Rays. 



CONTENTS. PAGE 



Science and the New Army ...... • .... 61 



The Roast Beef of Old England. By C. C. ... 62 



French Text-books of Chemistry. By J. B.C. . . 63 



Indian Beetles. By C. J. G. . . 64 



Mathematics : Pure and Applied. By Dr. S. 



Brodetsky 65 



Our Bookshelf 67 



Letters to the Editor: — 



Museums and the .Slate. —Prof. E. W. MacBride, 

 F.R.S. ; Prof. J. W. Gregory, F.R.S. ; Dr. 

 F. A. Bather, F.R.S. ; Dr. Wm. Evans Hoyle; 



William G. Wagner 68 



Some Methods of Approximate Integration and of 



Computing Areas. — A. S, Percival 70 



An Electronic Theory of Isomerism. ( With Diagrams. ) 



—Dr. H. S. Allen . . 71 



The Principle of Equivalence and the Notion of Force. 



— C. A. Richardson 72 



Expenses of Scientific Work. — Major A. G. Church 72 

 Scientific Reunions at the Natural History Museum. — 



Dr. G, F. Herbert Smith 72 



The World's Production of Silver 73 



Time-reckoning of the North Ametican Indians 75 



Obituary : Dr. Charles Gordon Hewitt . . 75 

 The Gyrostatic Compass. (Illustrated.) By S. G. 



Brown, F.R.S 77 



Notes 80 



Our Astronomical Column : — 



The Total Solar Eclipse of September 20, 1922 ... 84 



The Binary Star/ Eridani 84 



Faint Nebulse 84 



International Fishery Investigations 84 



Exhibition of Diseases of the Para Rubber-tree . . 86 



The Position of the Meteorological Office 87 



Earthworks and Retaining Walls 87 



Fellowship of the New Zealand Institute 88 



The Proposed University of Reading 88 



University and Educational intelligence , 88 



Societies and Academies . 89 



Books Received 91 



Diary of Societies 91 



Editorial and Publishing Offices: 



MACMILLAN AND CO., Ltd., 



ST. MARTIN'S STREET. LONDON. W.C.2. 



Advertisements and business letters to be addressed to the 

 Publishers. 



Edito'ial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number : Gerrard 8830. 



NO. 2629, VOL. 105] 



