566 



NATURE 



[February 23, 191 1 



drop, and never be in excess. — Marcel Dubard : Remarks 

 on the classification of the genus Sideroxylon. — J. Granier 

 and L. Boule : The phenomena of the conjugation of the 

 chromosomes at the prophase of the first reducing kinesis. 

 — ^Raoul Bayeux : Experiments made at Mt. Blanc in 1910 

 on gastric secretion at very high altitude. The experi- 

 ments were made on a dog, and showed that the quantity 

 of gastric juice secreted in a given time, the feeding being 

 maintained constant, diminishes in a marked manner 

 during a stay at a high altitude. The total acidity is 

 only slightly diminished under the same conditions. The 

 general activity of the gastric juice is also slowed down. 

 The bearing of these results upon mountain sickness is 

 discussed. — H. Agrulhon : The action of the ultra-violet 

 rays upon diastases. Eight diastases were studied, and all 

 of them were more or less rapidly attenuated by the radia- 

 tions passing through quartz and arrested by glass. — 

 Samuel Lifchitz : The sonorous reproduction of a periodic 

 curve. — A. Conte and C. Vaney : The experimental repro- 

 duction of acephalous Lepidoptera. — E. Roubaud : IBio- 

 logical studies on the Glossina of central Dahomey. — 

 H. Couti^re : The ellobiopsis of bathypelagic crayfish. — 

 Fernand Gu^gTuen : Cladosporian mycosis in man. 

 Details are given of a diseased condition in man caused 

 by a fungus of the genus Cladosporium, the first .example 

 of a pathogenic action of a member of this genus. — R. 

 Robinson : The heterotopic theory in pathology. — Louis 

 Gentil : The formation of the south Rif^ian isthmus.— Ph. 

 Ndgrris : The existence of the Trias and Cretaceous on 

 Mount Voidias in the north of the Peloponesus. 



DIARY OF SOCIETIES. 



rj¥f//?.S"/?/iK, February 23. 



Royal Society, at 4.30. — Transmifsion of Flagellates living in the 

 Blood of certain Freshwater Fishes: Miss M. Robertson.— Report on 

 the Separation of Ionium and Actinium from certain Residues, and on 

 the Production of Helium bv Ionium : Dr. B. B. Boltwood. — The 

 Secondary y-Rays produced by j3-Rays: J. A. Gray. — The Specific Heat 

 of Water and the Mechanical Equivalent of the Calorie at Temperatures 

 from 0° to 80° C. With Additional Note on the Thermoid Effect : 

 W. R. Bousfield and W. E. Bousfield.^On the Measurement of Specific 

 Inductive Capacity: Prof. C. Niven, F.R.S. 



RovAL Institution, at 3. — Problems of Animals in Captivity : P. Chalmers 

 Mitchell, F.R.S. 



Institution of Electrical Engineers, at 8.— Long Distance Trans- 

 mission of Electrical Energy: W. T. Taylor. — Extra High Pressure 

 Transmission Lines : R. B. Matthews and C. T. Wilkinson. 



FRIDAY, February 24. 



Royal Institution, at 9. — Mouvement Brownien et R^alit^ MoUculaire : 

 Prof. Jean Perrin. 



Physical Society, at 5.— Flames of Low Temperature supported by 

 Ozone : Hon. R. J. Strutt, F.R.S.— The Movement of a Coloured Index 

 along a Capillary Tube, and its Application to the Measurement of the 

 Circulation of Water in a Closed Circuit : Dr. Albert Griffiths. — An 

 Optical Lever of High Power suitable for the Determination of Small 

 Thicknesses and Displacements : E. H. Ravner. 



Institution of Civil Engineers, at 8. — The Design and Construction 

 of Works for the Bacterial Purification of Sewage: R. J. Samuel. 



MONDAY, February 27. 

 Royal Geographical Society, at 8.30. — Labrador : Dr. Wilfred T. 



Grenfell.C.M.G. 

 Royal Society of Arts, at 8. — Brewing and Modern Science : Prof. 



Adrian J. Brown. 

 Institute of Actuaries, at 5. — The Assurance Companies Act, 1909, 



some Explanatory Notes on such Portions of the Act as relate to the 



Business of Life Assurance : A. R. Barrand. 



TUESDAY, February 28. 



Royal Institution, at 3. — Crystalline Structure : Mineral, Chemical, and 



Liquid : Dr. A. E. H. Tutton, F.R.S. 

 Royal Society of Arts, at 4.30. — The Resources and Problems of the 



Union of South Africa : The Hon. Sir Richard Solomon, K.C.B. 

 Institution of Civil Engineers, at 8. — Modern Railway-signalling : 



some Developments upon the Great Western Railway : A. T. Blackall. 



WEDNESDAY, March i. 



Entomological Society, at 8. — Persistence of Bacilli In the Gut of an 

 Insect during Metamorphosis : A. Bacot. 



Society of Public Analysts, at 8. — Examination of the Process of 

 Shrewsbury and Knapp for the Estimation of Cocoanut Oil : R. Ross, 

 J. Race, and F. Maudsley. — The Estimation of Iron by Permanganate 

 m the Presence of Hydrochloric Acid : A. C. Cumming and A. Gemmell. 

 — The Analysis of Sweetened Condensed Milk : A. Backe. — Note on 

 Henry C. Frey's Method of Estimating Petroleum in Turpentine : 

 H. _S. Shrewsbury. — Note on .he Formation of Hypoiodites and their 

 Action on Sodium Thiosulphate— a source of error in certain Iodine 

 Titrations : J. P. Batey.— New Form of Specific Gravity Apparatus : 

 C, Butler Savory. 



Royal Society of Arts, at 8.— Caisson Sickness and Compressed Air : 

 Dr. Leonard Hill, F.R.S. 



NO. 2156, VOL. 85] 



THURSDAY, March 2. 



Royal Society, at ^.y^.— Probable Papers: Reversal of the Reflex Effect 

 of an Afferent Nerve bv altering the Character of the Electrical Stimulus 

 applied: Prof. C. S. Sherringion. F.R.S., and Miss S. C. Sowton. — 

 Carbon Dioxide output during Decerebrate Rigidity (preliminary com- 

 munication) : Dr. H. E. Roaf. — The Alcoholic Ferment of Yeast Juice. 

 Part VI. The Influence of Arsenates and Arsenites nn the Fermentation 

 of the Sugars by Yeast Juice: Dr. A. Harden. F.R.S., and W. J. 

 Young.— Experiments to ascertain If certain Tabanidae act as the Carriers 

 of Trypanosoma pecorum: Col. Sir D. Bruce, F.R.S., and others. 



Linnean Society, at 8. — Dermaptera (Earwigs) preserved in Amber, from 

 Prussia: Dr. Malcolm Burr. —Report on the Marine Polyzoa of the 

 Collection made by Mr. J. Stanley Gardiner In the Indian Ocean in 

 H.M.S. Sea/ark: Miss Laura Roscoe Thoinely. — On the Mysidacea 

 and Euphausiacea collected In the Indian Ocean during 1905 : W. M. 

 Tattrrsall. 



RSntgen Society, at 8.15. — Some Experiments with a 10,000 volt. Storage 

 Battery : A. A. Campbell Swinton. 



FRIDAY, March 3. 



Royal Institution, at 9 —Scents of Butterflies : Dr. F. A. Dixey, 



F.R.S. 

 Institution of Civil Engineers, at 8. — Lagos Harbour Survey, 1909- 



1910: H. Ellis Hill. 



SATURDAY, March 4. 



Royal Institution, at 3.— Radiant Energy and Matter: Sir J. J. 

 Thomson, F.R.S. 



MONDAY, March 6. 

 Society of Engineers, at 7.30. — Petrol Air-gas : E. Scott-Snell. 



CONTENTS. 



PAGE 



Parker and Haswell's Zoology. By Prof. F, W, 



Gamble, F.R.S 533 



Paints and Painting. By A. H, C 533 



The Colloid State of Matter. By H. R. P 534 



Travels in Iceland. By M. G. B 535 



Heredity and its Physical Basis. By E. H. J. S. . 536 



Geology Made Easy. By A. H 536 



All Sorts and Conditions of Women 537 



Applied Mechanics 537 



Our Book Shelf 536 



Letters to the Editor: — 



A Perpetual Calendar.— Sir William Ramsay, 



K.C.B., F.R.S. ; W. T. L 540 



The Progressive Disclosure of the Entire Atmosphere 



of the Sun.— Albert Alfred Buss 540 



Vibrations of a Pianoforte Sound-board. {Illustrated. ) 



— G. H. Berry S4> 



Occurrence of Matonia sarmentosa in Sarawak. — 



Cecil J. Brooks . S4i 



Glacial Erosion.— R. M. Deeley ; J. W, G. ... 541 

 The Ethnography of South Africa. {Illustrated.) 



By Sir H. H. Johnston, G.C.M.G., K.C.B 542 



Photographic Biography of Birds. {Illustrated.) . 544 

 The Conservation of Natural Resources. By 



E. J. R 545 



Indian Wheat for the British Market 547 



Notes 547 



Our Astronomical Column : — 



Nova Lacertre 55^ 



Nova Sagittarii, No. 3, H.V. 3306 552 



The Satellites of Mars 552 



The Spectra of some Wolf-Rayet Stars 552 



Southern Nebulae 552 



A Slowly Moving Meteor 552 



Geological Work in British Lands. I. — In Asia 



and in Africa. {Illustrated.) By G. A. J. C. ... 553 



The Airship for the British Navy 555 



Infant and Child Mortality 55^ 



Fixation of Atmospheric Nitrogen. By F. M. P. . 556 



Bird Notes. By R. L 557 



The Australasian Association for the Advance- 

 ment of Science 557 



Recent Advances and Problems in Chemistry . . 558 



University and Educational Intelligence 563 



Societies and Academies 5^4 



Diary of Societies 5^6 



y. 



