•joo 



NATURE 



[May 27, 1922 



distances, is seen from the earth at an angle of one- 

 miUionth of a second of arc. — M. Painleve : Remarks 

 on the two preceding communications. — P. Fatou : 

 The movement of a planet in a resisting medium. — 

 G. Guillaumin : The equiUbrium of a talus in coherent 

 earth. — P. Dienes : The connection of the tensorial 

 field. — M. St. Procopiu : An electro- and magneto- 

 optical effect in liquids holding metalUc powders 

 in suspension. All liquids containing fine metallic 

 powders in suspension show negative double refraction 

 both in a magnetic and in an electric field. Thus 

 double refraction does not disappear at once when 

 the field is suppressed ; there is a lag of about three 

 minutes, except in the case of mercury, in which the 

 double refraction disappears almost instantaneously. — 

 E. E. Blaise and Mile. Montagne : The action of thionyl 

 chloride on the a -acid alcohols. Thionyl chloride 

 and glycolUc acid give two main products : chlor- 

 acetyl-glycolUc chloride, CH^Cl . CO . O . CH., . COCl, 

 and the chlorosulphite, CI . SO . O . CHg . COCl. The 

 latter decomposes readily on heating into sulphur 

 dioxide and chloracetyl chloride. — E. Grandmougin : 

 The quindolines. — C. Deguide and P. Baud : A new 

 method for the industrial manufacture of baryta 

 for the treatment of sugar molasses. Barium 

 carbonate and silica, both in a very fine state of 

 division, are heated together at a temperature of 

 1300° C. Subsequent lixiviation with water gave from 

 78 to 81 per cent, of barium hydrate, Ba(OH)2 . 8H2O. 

 — L. Semichon : The composition of wine lees. — L. 

 Royer : The inversion of the rotatory power in 

 anisotropic liquids. — H. Joly : The presence of 

 transported scales or fragments in the Celtiberic 

 chain. (Provinces of Saragossa, Logrono, and Soria, 

 Spain.) — P. Russo : The geological constitution of 

 the territory of the Hants Plateaux and of Figuig 

 (eastern Morocco). — H. Lagotala : The chronology 

 of the Quaternary and the Cotencher excavations. — 

 C. Corroy : The Neocomian and Albian reptiles of the 

 Paris basin. — P. Bugnon : The bifurcated ramifica- 

 tion in the cotyledons. — R. Soueges : The embryogeny 

 of the Rosaceae. The last stages of the development 

 of the embryo in Geum urbanum. — A. Labbe : The 

 role of the alkahnity of sea water in heterogeneous 

 impregnations. — W. R. Thompson : Theory of the 

 action of - insect - destroying parasites. The mathe- 

 matical formulae of cyclic parasitism.^ — L. Mercier 

 and R. Poisson : Haplosporidium Caulleryi, a 

 parasite of Nereilepas fucata. 



Brussels. 

 Royal Academy of Sciences, May 2. — M. A. Lameere 

 in the chair. — CI. Servais : The geometry of the 

 tetrahedron (V.). — Th. De Bonder : On the theorem 

 of Nemst. — L. Godeaux : On the rational correspond- 

 ences between two surfaces of one kind. — G. Fournier 

 and P. Pruvost : Discovery of a new fish in the 

 black marble of Denee. — D. Tits : The exciting factors 

 for germination in a fungus, Phy corny ces nitens. 



Official Publications Received. 



Catalogue of 1068 " Intermediate " Stars situated between 51° and 

 65° South Declination for tlie Equinox 1900 : From Observations made 

 at the Sydney Observatory, New South Wales, Australia, during the 

 Years 1918-1919. By Prof. W. E. Cooke. Pp. vii+29. (Sydney: 

 W. A. Gullick.) 



Stonyhurst College Observatory. Results of Geophysical and Solar 

 Observations, 1921 : With Reports and Notes of the Director, Rev. 

 A. L. Cortie. Pp. xv + 45. (Blackburn.) 



Carnegie Institution of Washington. Annual Report of the Director 

 of the Department of Botanical Research. (Extracted from Year 

 Book No. 20 for the Year 1921.) Pp. 43-75. (Washington.) 



Colony and Protectorate of Kenya. Annual Report of the Forest 

 Department, 1920-21. Pp. 15. (Nairobi.) 50 cents. 



Ministry of Public Works, Egypt. Zoological Service (Publication 

 No. 35). Report on the Zoological Service for the Year 1921, in which 

 is included the 23rd Annual Report of the Giza Zoological Gardens. 

 By Major S. S. Flower. Pp. ii-18. (Cairo : Government Publica- 

 tions Office.) P.T. 5 ; Is. 



-Sir Hugh Allen : Early 



Diary of Societies. 



FRIDAY,Uky2&. 

 Royal Society of Arts (Indian Section), at 4.30.— Sir Thomas W. 



Arnold : Indian Painting and Muhammadan Culture (Sir George 



Birdwood Memorial Lecture). 

 Physical Society of London (at Imperial College of Science and 



Technology), at 5. — Dr. F. W. Aston : Atomic Weights and Isotopes 



(Lecture). 

 Royal Society of Medicine (Study of Disease in Children Section) 



(Annual General Meeting), at 5. 

 Junior Institution of Engineers, at 8. — J. C. Rennie : Engineering 



Appointments and how to get them. 

 Royal Society of Medicine (Epidemiology and State Medicine 



Section), at 8. — Dr. R. Dudiield : Reforms needed in the Notification 



of Tuberculosis. 

 Royal Institution of Great Britain, at 9.— Prof. W. E. Dalby : 



The Internal Combustion Engine : Its Influence and its Problems. 



SATVRDAY, MAY 27. 

 Royal Institution of Great Britain, at : 

 Keyboard Music (1). 



MONDAY, MAY 29. 

 Royal Geographical Society (Anniversary Meeting) (at iEolian 



Hall), at 5.30. — Presentation of Royal Medals and other awards ; 



Presidential Address ; Annual Report ; Election of Officers and 



Council. 

 Royal Institute of British Architects, at 8. — W. Harvey : Colour 



in Architecture. 

 Society of Chemical Industry (London Section) (at Institution of 



Mechanical Engineers), at 8. — Sir George Beilby : Structure of Coke : 



Its Origin and Development. 



TUESDAY, May 30. 

 Royal Institution of Great Britain, at 3. — Sir Percy Sykes : 



Twenty-flve Years' Travel in Persia. 

 Royal Photographic Society (Lantern Meeting), at 7. — E. J. 



Bedford : Wild Flowers. 

 Fellowship of Medicine (at Royal Society of Medicine), at 5. — Sir 



W. Arbuthnot Lane, Bart. : Fractures. 



WEDNESDAY, MAY 31. 

 Royal Society of Arts, at 3. — L. Haward : The Manchester Art 

 Gallery and the Problem of Provincial Collections. 



THURSDAY, June 1. 

 Royal Institution of Great Britain, at 3. — Very Rev. Dean Inge : 



Theocracy (2). The Mediaeval Idea. 

 Royal Society, at 4.30. — Prof. T. H. Morgan : The Mechanism of 



Heredity (Croonian Lecture). 

 LiNNEAN Society of London, at 5. — Prof. A. C. Seward : Hooker 



Lecture. 

 Junior Institution of Engineers (at Institution of Electrical 



Engineers), at 7.30. — Sir Eric Geddes : Fourth Canet Lecture 

 Chemical Society, at 8.— J. S. Buck and I. M. Heilbron : The Reactivity 



of Doubly-conjugated Insaturated Ketones. Part III. TJnsymmetrical 



Hydroxy- and Methoxy -derivative s. — J. S. Buck and I. M. Heilbron : 



Phanopyryllium Salts of Distyryl Ketones. Part I. 



FRIDAY, JUNE 2. 

 Diesel Engine Users' Association (at Institution of Electrical 

 Engineers). — H. F. P. Purday : Marine Diesel I'^ngines. 



SATURDAY, June 3. 

 Royal Institution of Great Britain, at 3. 

 Keyboard Music (2). 



-Sir Hugh Allen : Early 



PUBLIC LECTURES. 



(A number in brackets indicates the number of a lecture in a series.) 



FRIDAY, May 26. 



BiRKBECK College, at 6. — Dr. E. J. Russell : Recent Work with 

 regard to the Influence of Soil Conditions on Agriculture (3). 



MONDAY, MAY 29. 

 University Coilege, at 5. — A. T. Walmisley : Groynes and Sea 

 Defence Works. 



TUESDAY, MAY 30. 

 King's College, at 5.30. — C. E. M. Joad: Vitalism Restated (1). 

 The Reduction of Ethics to Psychology.— Dr. D. Subotic : Influence 

 of Geography on the Economic Conditions of Jugo-Slavia (1). 



WEDNESDAY, May 31. 

 King's College, at 5. — Dr. A. Harker : Tertiary Igneous Action in 



Britain (3). 

 Royal Society op Medicine, at 5. — Prof. J. Babinski : Des Reflexes 



de Defense. (In French.) 

 School of Orfental Studies, at 5.— Dr. R. A. Nicholson : The Idea 



of Personality in Suflsm (3). 

 University College, at 5.15.— Dr. D. H. Scott : The Early Histors' 



of the Land Flora (6) ; — at 6.30. — Miss Mildred Swannell : Individual 



Work and Dr. Montessori. 



THURSDAY, June 1. 

 St. Mary's Hospital (Institute of Pathology and Research), at 5. — 

 Sir A. Cruickshank Houston : The Purification of Water. 



NO. 2743, VOL. 109] 



