6o4 



NATURE 



[July 3, 1920 



not hydrolysed at the ordinary temperature; whilst 

 with saccharose and raffinoso the Igevulose is com- 

 pietelv spHt off after sufficient time at the ordinary 

 temperature or after one hour-at 98° C— L. Cayeux : 

 The secondary- quartz and the rhombohedral quartz 

 in' the iron liiinerals of the Longwy-Briey basin.— 

 R. . Abrard : The existence of the Aalenian stage in 

 the massif of Zerhoun and at Djebel Tselfat (Western 

 Morocco).— P. Russo : The alluvial terraces of Oum 

 er Rbia (Western Morocco).— L. Daniel : Antagonistic 

 rA^actions and the role of. the pad in grafted plants.— 

 A. .tiMilliermond : The structure of the plant-cell. 

 Reply to a recent communication of M. Dangeard.— 

 M. Dangeard: Reply to the preceding note. — E. 

 Licent : The use of mixtures of formal and chromium 

 ccfmpounds as fixing agents. Three formulae are 

 given for fixing reagents containing formal, chromic 

 acid, and acetic acid in different proportions. Al- 

 though the use in the same Hquid of a powerful 

 oxidising agent and a reducing substance would 

 appear to l^e irrational, long experience has shown 

 that such mixtures give excellent results. — E. 

 Roubaud : The use of tripxymethylene in powder for 

 the destruction of the larvae of mpsquitoes. Trioxy- 

 methylene exerts a specific toxic action on these larvae, 

 and has advantages over petroleum and other re- 

 agents in use. Detailed instructions for the best 

 application of the trioxymethylene are given. — J. 

 Nageotte : The toxicity of certain dead heterogeneous 

 grafts.— A. Goris : The chemical composition of the 

 tubercle bacillus. A new siibstance has been obtained 

 from tubercle bacilli by extraction with chloroform 

 <ind subsequent purification by precipitation from 

 chloroform solution with ether, the fats remaining in 

 solution in the ether and the new substance, . named 

 hvalinol, being precipitated. Seven grams were ob- 

 tained from 1500 grams of the bacilli. An analvsis 

 and some reactions of the hvalinol are given.^ — -R. 

 Ducloux ; The formation of asporogenic races of 

 Bacillus anthracis. The attenuation of its virulence. 

 —MM. A. Trillat and Mallein : Experiments on the 

 transmission of an infectious disease in animals bv 

 the intermediary of air. Influence of the tempera- 

 ture.^MM. A. "Mayer, Guieysse, Plantefol. and Faure- 

 premiet : Pulmonary lesions determined by blistering 

 compounds. Studies on the pulmonary lesions caused 

 bv the inhalation of vaporised • or pulverised dichloro- 

 ethyl sulphide on the dog, rabbit, and guinea-pig. - 



Books Received. 



Techno-Chemical Receipt Book. Compiled and 

 edited by W. T. Brannt and Dr. W. H. VVahl. 

 Pp. xxxiii + 516. (London : Hodder and Stoughton, 

 Ltd.) i^s. net. 



Psychoneuroses of War and Peace. By Dr. M. 

 Culpin. Pp. vii+ 127. (Cambridge : At the Univer- 

 sity Press.) los. net. 



Reports of the Department of Conservation and 

 Development, State of New Jersey. Annual Report 

 for the Year ending June 30,' 1919. Pp. 115. 

 (Trenton, N.J.) 



The Science Reports of the Tohoku Imperial Uni- 

 versity. I St Series. (Mathematics, Physics, Chemis- 

 try.) A'ol. ix.. No. 2, April. (Tokvo : Maruzen Co., 

 Ltd.) 



Meddelanden frSn Lunds Astronomiska Observa- 

 torium. Serie ii., Nr. 22 : A Studv of the Stars of 

 Spectral Tvpe A. Bv H. G. Mal'mquist. Po. 69. 

 (Lund.) ■ ' ^ • ^ 



The Journal of the Royal Agricultural Society of 

 England. Vol. Ixxx. Practice w'lth Science. Pp. 

 viii-t-438-fcli. (London: J. Murray.) los. 



NO. 2645, VOL. 105.] 



Diary of Societies. 



THURSDAY, July 8. 

 RovAi. Society ok Medicine (Obstetrics and Gynaecology Section), 

 at 8.— G. Ley: The Pathology of Accidental Haimorrhage. 



FRIDA y, Jui.v 9. 



West London Medico-Chirhrgicai. Society (at the West London 

 Hospital), at 5. -AnnCial General Meeting. 



SATURDAY, July 10. 

 Physiological Society (at Physiological Laboratory, University, Oxford), 

 it 4.— J. K. Leathes and H. C. Broadhurst : Excretion of Phosphate. — 

 J. Barcroft and F. J. Roughton: Diffusion Coefficient of Lung.— S. P. L. 

 S</)rensen and E. J. Cohn : Solubility of Globulin. — A. Krogh : Reaction 

 ot Blood Vessels to Local Stimuli. 



TUESDAY, July 13. 

 Society for the Study ok Inebriety (at the Medical .Society of 

 London), at 4. — A. Evans and Others : Discussion on Alcohol and 

 Alcoholism in relation to Venereal Disease. 



WEDNESDAY, ]vuv n. 

 Institution of Petroleum Technologists (in Canada Building, 

 Crystal Palace), at 6 — H. Barrlnger : Oil Storage, Transport, and 

 Distribution (Free Public Lecture). 



THURSDAY, July 15. 

 Royal Society of Medicine (Dermatology Section), at 5. 

 R5NTGEN Society (at University College), at 9. — Dr. W. D. Coolidge : 

 Address (Special ()pen Meeting). 



CONTENTS. PAGE 



Medical Education 573 



The Theory and Facts of Colour Vision , 575 



Hydrographical Surveying . 576 



Forestry, Tree Diseases, and Timber 577 



Our Bookshelf 579 



Letters to the Editor:— 



Weather Forecasts and Meteorology. — A. Mallock, 



F.R.S. . .580 



The Rate of Ascent of Pilot-?alloons. ( With 

 Diagram.)—]. S. Dines ... ....... 581 



Diamagnetism and the Structure of the Hydrogen 



Molecule.— Dr. A. E. Oxley 581 



University Stipends and Pensions. — G. W. O. H. 582 

 The Separation of the Isotopes of Chlorine. — Angus 



F. Core . 582 



The Island of Stone Statues. {Illustrated.) By Sir 



Everard im Thurn, K.C.M.G., K.B.E. 583 



The Blue Sky and the Optical Properties of Air. 



By The Right Hon. Lord Rayleigh, F.R.S. . . 5S4 

 The Future of the Iron and Steel Industry in 

 Lorraine. By Prof. H. C. H. Carpenter, F.R.S. . 588 



Obituary . , 59° 



Notes 590 



Our Astronomical Column: — 



Commencement of the Great Perseid Shower ot 



Meteors . 595 



The Expanding Disc of Nova Aquilae . . ■ .... 595 



The New Minor Planet GM 595 



Annual Visitation of the National Physical 



Laboratory 595 



The Carnegie Foundation and Teachers' Pensions 596 

 National Food Consumption in the United States. 



By M. G 597 



Engineering Research in the U.S.A. By A. P. M. 



Fleming, C.B.E 598 



African Softwoods for Pulp Production. By A. H. 



Unwin 599 



Effect of Topography on Precipitation in Japan. 



By W. W. B 599 



Economic Entomology in the Philippines. By 



O. H. L 600 



Climate of the Netherlands 600 



The Present Condition of the Aborigines of Central 



Australia. By E. N. Fallaize 601 



University and Educational Intelligence .... 601 



Societies and Academies 602 



Books Received 604 



Diary of Societies 604 



