288 



NATURE 



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DIARY OF SOCIETIES. 



FRIDAY, May 16. 

 Royal Institution, at 9. — The Pygmies of New Guinea : 



SATURDAY, May 17. 



Roval Institution, at 3.— Humphrey Internal Combustion Pumps: 

 H. A. Humphrey. 



TUESDAY, May so. 



Royal Institution, at 3. — I 

 Utilisation of Wheat in Engla 



Royal Statistical Society, 

 W. J. Thompson. 



Zoological Society, at 8.30. —Notice of Some Important Works on 

 Zoological Nomenclature Now in Progress: Rev. T. R. R. Stebbing.— 

 Observations on ihe South African Rhvnchocephaloid Reptile Euparkeria 

 and Allied Genera : Dr. R. Broom.— Experiments on the Metamorphosis 

 of the Axolotl (Amtilrstoma tigrinum) conducted in the Society's 

 Gardens: E. G. Bout nger. — Some Cases of Blindness in Marine Pishes: 

 G. E. F.ullen. -The Patella in the Phalacrocoracida: : Dr. R. W. Shufeldt. 



: Prof. T. B. Wood. 

 5. — The Census of Irela 



the Production and 



WEDNESDAY, May 

 Royal Geographical Society, at 8.45. — R« 

 Captain Scott's Antarctic Expedition. 

 Evan', R.N. 



Royal Meteorological Society, at 4.30.— Determination of the Radia- 

 tion of the Air from Meteorological Observations: E. Gold. — Results of 

 Monthly and Hourly Cloud-form Frequencies, at Epsom, 1903-igio : 

 S. C. Russell. 



Aeronautical Society, at S. 30.— Wilbur Wright Lecture. 



Royal Microscopical Society, at 8. — Annual Exhibition of Microscopic 



Aquatic Life. 



THURSDAY. May 22. 

 Royal Society, at 4.30.— Bakerian Lecture : Rays of Positive Electricity : 



Sir J.J. Thomson. 

 Royal Institution, at 3. — Recent Chemical Advances. I. Molecular 



Architecture : Prof. W. J. Pope. 

 Institution of Electrical Engineers, at 8.— Annual General Meeting. 

 Concrete Institute, at 4.30. — Annual General Meeting. 

 Institution of Mining and Metallurgy, at 8. 



Royal Institution, 

 S. P. Thompson. 



FRIDAY, May 23. 

 .—The Secret of the Permanent Magnet : Prof. 



SATURDAY, Ma 



CONTENTS. page 



A New Text-book of Physiology 263 



British Botanists. By A. W. H 264 



Practical and Theoretical Physics 265 



Our Bookshelf . 266 



Letters to the Editor: — 



Some Phenomena Connected with Reflected X-Rays. 



(With Diagrams.)— Dr. E. Hupka 267 



Diffraction Patterns from Crystals. {Illustrated.) — 



Dr. H. S. Allen 268 



Bird Proteclion and the Collector.— Miss L. 



Gardiner - . 268 



Mechanically-formed Grikes in Sandstone. — Alex. 



Stevens 269. 



The Mountains and their Roots. — Rev. O. Fisher . 270 

 An Application of Mathematics to Law. — R. Stafford 



Cripps ; Harold E. Potts 270 



Synthetic Biology and the Mechanism of Life. 



(Illustrated.) By W. A. D . 270 



Semi-centennial Celebration of the National 



Academy of Sciences in Washington 272 



Scales of Fish as Tests of Age '. . . 273 



The Royal Society Conversazione 273 



Notes 276 



Our Astronomical Column : — 



A New Faint Comet (1913a) 280 



The Physical Appearance of Mars 280 



The National Observatory of Athens 280 



Frequency of Prominences on Eastern and Western 



Limbs of the Sun 281 



Evening Educational Work in London. By J. 



Wils.n 281 



Law of the Pay-streak in Placer Deposits. By 



H. M. A 282 



The Upper Air during Fohn. By E. Gold .... 282 

 Active Nitrogen. (With Diagrams.) By Hon R. J. 



Strutt, F.R.S 283 



University and Educational Intelligence 285 



Societies and Academies 285 



Books Received 287 



Diary of Societies 2S8 



NO. 2 2 72, VOL. 91] 



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Advertisements and business letters to be addressed to the 

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Editorial Communications to the Editor. 

 Telegraphic Address: Phusis, London. 

 Telephone Number : Gerrard 8830. 



