520 



NATURE 



[December 15, 192 1 



Diary of Societies. 



THURSDAY. December 15. 



BoTAL SociETi OF MEDICINE (Dermatology Section), at 4.30. — Major 

 A. E. Milner : Diathermy in the Treatment of Lupus Erythema- 

 tosus. 



LiNNEAN Society or London, at 5. — Prof. G. C. Bourne : The 

 Baninidse, a Group of Crustacea. — F. A. Potts : Narrative of the 

 Oarnegrie Institution Expedition to Samoa. 



Nkwcomen Societt (at King's College, Strand, ■W.C.2), at 5. — An- 

 nual General Meeting. — At 5.15. — R. C. S. Walters : Greek and 

 Boman Engineering Instruments. 



London Mathematical Society (at Royal Astronomical Society), at 5. 

 — J. H. Jeans : The New Dynamics of the Quantum Theory (Lec- 

 ture). The following papers will be taken as read: — W. P. Slilne : 

 The Relations Between Apolarity and Clebsch's Mapping of the 

 Cubic Surface in a Plane.— iliss G. D. Sadd : Certain Types 

 of Plane Unicursal Curves. — H. M. Shaffer : The General Theory 

 of Notational Eelativity. — Pundit Oudh Upadhyaya : (1) Note on 

 Gauss's Quadratic Identity ; (2) A General Formula in Cubic 

 Forms. — J. R. Wilton : Gibbs's Phenomenon in Fourier's Series 

 and Integrals. 



Institvtion of Mining and Metallurgy (at Geological Society), 

 at 5.30. — Discussion on Paper by H. F. Collins : The Igneous 

 Rocks of the Province of Huelva and the Genesis of the Pyritio 

 Orebodies. — A. T. Reis : Underground Working of Wide Pyritic 

 Orebodies. 



BoYAL AERONAfTicAL SOCIETY (at Boyal Society of Arts), at 5.30. — 

 — Capt. F. M. Green : Development of the Fighting Aeroplane. 



Society of Architects, at 6. 



Child Study Society (at Boyal Sanitary Institute), at 6. — Miss 

 von Wyss : Vital Elements in Art Teaching. 



Institt-tion of Electrical Enginf.ers, at 6— 7L. H. A. Carr : Induc- 

 tion-type Synchronous Motors. 



Concrete Institute, at 7.30. — E. F. Sargeant : (a) The Preparation 

 of Concrete Aggregates; (b) Moving Forms. 



Chemical Society, at 8. — G. T. Morgan and J. D. Main Smith : 

 Besearches on Besidual Affinity and Co-ordination. Part VII., 

 Cobaltio Lakes of the Alizarin Series. 



Institution of ArTOMOBiLE Engineers (London Graduates' Meet- 

 ing), at 8.— E. Chatterton : The Design of Automobile Clutches. 



Camera Czvb, at 8.15. — F. F. Benwick : The Action of Dyes in 

 Colour Sensitising and Desensitising Dry Plates. 



BoY.u, Society of Tropical SIedicine and Hygiene, at 8.13. — Dr. A. 

 Balfour: A JFedical and Sanitary Survey of Mauritius — Past, 

 Present, and Future. 



Society of Antiqtjjiries, at 8.30. 



FRIDAY, December 16. 



Institute of Transport (at Boyal Society of Arts), at 5. — J. Pater- 

 son : The Operation of a Boad Distributing Agency. 



Institution of ^Iechanical Engineers, at 6. — G Mitchell : Conveying 

 and Elevatinsr ^[aohinery. — R. E. Knight: Discharge of Grain 

 Cargoes in the Port of London by Pneumatic Elevators. 



Junior Institution of Engineers, at 8. — A. J. Simpson : Notes on 

 Searchlight Construction and Operation. 



Boyal Photographic Society of Great Britain (Pictorial Group), 

 at 8. — L. Bichmond : Address. 



SATURDAY, December 17. 



Physiological Society (at London Hospital), at 4. — H. E. Boaf : 

 (i) The Relation of Plant Pigments to Urinary Pigmentation : 

 (ii) A Useful IModification of the Induction Coil: (iii) The Aciditv 

 of Muscle during Jfaintained Contraction. — W. A. M. Smart and 

 H. E. Boaf : The Belation of Methsemoglobin to Oxyhremoglobin. 

 — W. A. M. Smart : A Simple Refractometer. — ^B. N. E. Condon : 

 A New Drop-recorder. — H. E. Boaf : A Simple ^Method for the 

 Detection of Nitrogen in Physiological Fluids. — G. Williamson : 

 Note on the Besonator Svstem in the Cochlea, with a Alodel.— 

 T. Lewis, A. N. Drury. C. C. Ilieseu, and A. M. Wedd : The 

 -Action of Quinidine on the Alamnnalian .\uric?e.. — E. C. Dodds and 

 J. Mcintosh: Changes in the CO2 Content of Whole Blood and 

 Plasma produced by Jfeals. — V. H. I^fottram : Growth of Cats 

 on Various Pure and Mixed Fats. — H. Hartridge : Vindication 

 of the Besonanee Theory of Hearing. — -D. T. Barry: Spontaneous 

 Bhythmic Contractions of Flexor Type in the Dog's Hind Limb. 

 Postural Influence, etc. 



MONDAY, December 1.9. 



Institution of Mechanical Engineers (Graduates' Meeting), at 7. — 



C. Poole : Worm-gearing. 

 Aristotelian Society Cat University Club. 21 Gower Street, W.C.I), 



at 8. — F. Tavani : Phvsical Space and Hvperspaces. 

 BoY.AL Institute of British Architects, at S. 



TUESDAY, December 20. 



Boyal Society of Medicine, at 5. — General Meetinsr. 



BoY.AL Statistical Society (at Boval Society of Arts), at 5.15. — 



E. A. Rusher : Statistics of Industrial Morbidity in Great 



Britain : A Retrospect and a Scheme of Development. 



Royal Photographic Society of Great Britain, at 7. — C. B. C. 



Petley : The Chamonix Vallev (Lantern greeting). 

 Boyal Geographical Society (jointlv with the Alpine Clubl (at 



Queen's Hall), at 8.30.— Lieu't.-Col. C. K. Howard-Bury, G. L. 



Mallorv, and other Jfembers of the Expedition : The Mount 



Everest Expedition. 



NO. 2720, VOL. 108] 



WEDNESDAY, Decembbb 21. 



Boyal Society of Medicine (History of Medicine Section), at 6.— 

 C. J. S. Thompson : The Parturition Chairs — their History and 

 Use.— Miss Eileen Power: An English Woman Doctor in tl 

 Fifteenth Century. 



Boyal Meteorological Society, at 5. 



Geological Society of London, at 5.30. — L. Owen : Notes on 1 

 Phosphate Deposit of Ocean Island, with Bemarks on the Pli 

 phates of the Equatorial Belt of the Pacific Ocean — H. 

 Milner : The Nature and Origin of the Pliocene Deposits of 1 

 County of Cornwall, and their Bearing on the Pliocene Geoki 

 of the South-West of England. 



Boyal Microscopical Society, at 8.— E. A. Smith : The Microsooi 

 in Non-ferrous Metallurgical Besearch. — Dr. J. G. Parker 

 Dr. S. H. Browning: The Practical Value of the Microscope' 

 Connection with Leather Manufacture. 



PUBLIC LECTURES. 



(.4 number in brackets indicates the number of a lecture 

 in a series.) 



THURSDAY, December 15. 

 Boyal College of Surgeons, at 4. — F. W. Twort : Recent RcBearol 



on the Biology of Bacteria (Brown Lecture) (3). 

 University College, at 5.— Prof. J. E. G. De Montmorency : Eeligio 



and Feudalism (7). 

 Leplay House, 65 Belgrave Boad, S.W.I, at 8.15— Dr. C. W. Saleeby] 



Light against Death. 



MONDAY, December 19. 

 BoY.AL College of Surgeons, at 4. — F. W. Twort : Becent Besearcl 



on the Biology of Bacteria (Brown Lecture) (4). 

 King's College, at 5.30. — Dr. W. R. Ormandy : Liquid Fuel 

 gines (5). 



TUESDAY, December 20. 

 Royal College of Surgeons, at 4. — F. W. Twort : Becent Besearol 



on the Biology of Bacteria (Brown Lecture) (5). 

 King's College, at 5.30. — Dr. W. Brown : Psychology and Psyoi 

 therapy (10). 



WEDNESDAY, December 21. 

 School of Ohient.al Studies, at 12. — Miss Alice Werner : Bani 

 Tribes of East Africa (6). 



CONTENTS. PAGE 



The Research Department 489 



Gas Warfare. By S. J. M. A 492 



Zoology for Medical Students 493 



The Study of Rocks. By Dr. J. W. Evans, F.R.S. 494 



Our Bookshelf 495 



Letters to the Editor:— 



The Action of Sunlight. — Sir Oliver Lodge, F. R. S. 496 

 Micrcscope Illumination and Fatigue. — H. J. 



Denham 49^ 



Tin Plague and Scott's Antarctic Expedition.— Prof. 



Alan W. C. Menzies . .... 496 

 The Dispersal of Snails by Birds.— Prof. T. D. A. 



Ccckerell 49^ 



The Distribution of Brightness in the Penumbra 

 during an Eclipse of the Moon. (IViik Diagrams.) 



F. J. W. Whipple 497 



Awards to Discoverers.— Walter B. Priest ... 498 



The Smoke-veil.— Dr. W. Lawrence Balls ... 499 

 An Oyster Spat (1921) with Mature Male Sexual 



Product.s.— Dr. J. H. Orton ......... 500 



The Flight of Thistledown. Prof. James Small . 500 

 The Study of Agricultural Economics. By C. S. 



Orwin • 5 ' 



Black Coral as a Charm for Rheumatism. By Prof. 



J. Stanley Gardiner, F.R.S 5^ 



Obituary: — . 



J. M. Doddp. By J. H. G 506 



Notes • S<» 



Our Astionomical Column : — 



Fireballs . 5'I 



Observers' Handbook, 1922 (British Astronomical 



Association) 5'' 



Perturbations of Saturn's Rings 5" 



The Mound-builders of Dunstable 5'2 



Norwegian Meteorology. By J. W 512 



The Preservation of our Fauna. By T. A. Coward 513 



Researches on Food 5*3 



University and Educational Intelligence . . . . 5'4 



Calendar of Scientific Pioneers S'S 



Societies and Academies S'S 



Books Received 5^^ 



Diary of Societies 5^° 



