444 



NATURE 



[June 26, igr 



Translated by J. C. Hunsaker. Pp. xvi + 242 + xxvii 

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Catalogue of the Lepidoptera Phalaena? in the 

 British Museum. Vol. xii. By Sir G. F. Hampson, 

 Bart. Plates cxcii-ccxxi. (London : British Museum ; 

 Longmans and Co.) 



Catalogue of the Ungulate Mammals in the British 

 Museum (Natural History). Vol i. By R. Lydekker. 

 Pp. xvii + 249. (London: British Museum; Long- 

 mans and Co.) 



Catalogue of the Books, Manuscripts, Maps, and 

 Drawings in the British Museum (Natural History). 

 Vol iv. Pp. 1495-1956. (London : British Museum ; 

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The Oxford Geographies. Edited bv A. J. Herbert- 

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Modern Electrical Theory. By Dr. N. R. Camp- 

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The Land of the Blue Poppy : Travels of a 

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Treatise on General and Industrial Organic Chem- 

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Tables Annuelles de Constantes et Donn^es 

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Junk's Natur-Fiihrer. Tirol, Vorarlberg und Liech- 

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Eine geographische Studienreise durch das westliche 

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Handworterbuch der Naturwissenschaften. Edited 

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La Region du Haut Tell en Tunisie. By Dr. C. 

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Soci^te' Franchise de Physique. Proces-Verbaux et 

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Societe Francaise de Physique. Annuaire 1913. 

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Reports from the Laboratory of the Royal College 

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NO. 2278, VOL. 91] 



DIARY OF SOCIETIES. 



THURSDAY, June 26. 



-Phosphorescence of Mercury Vapour afte 



Royal Society, ', 

 Removal of the Excitin; Light : F. S. Phillips.— Light Sensations and the 

 Theory of Forced Vibrations : Dr. G. J. Hurch.— The Fluctuation in the 

 Ionisation due to y Rays : P. W. Burbidge.— The Force Exerted on a 

 Magnetic Particle by a Varying Electric Field : J. G. Leathern.— The 

 Luminosity Curve of a Colour-blind Observer : Dr. W. Watson —A 

 Critical Study of Spectral Series. Part iii. The Atomic Weieht Term, and 

 its Import in the Constitution of Spectra : Prof. W. M. Hicks.— A Band 

 Spectrum attributed to Carbon Monosulphide : L. C. Martin. And other 

 Papers. 



FRIDAY, June 27. 



Physical Society, at the National Physical Laboratory, Bushy House, 

 Teddington, from 3.30. — Demonstrations of Work in Progress in the 

 Laboratory. 



MONDAY, June 30. 



Junior Institution of Engineers, at 8.— Gustave Canet Lecture: The 

 Working Fluid of Internal Combustion Engines : Dr. Dugald Clerk. 



CONTENTS. page 



Organic Chemistry in Manufactures. By C. S. . . 419 



The Animals of the Ancients. By R. L 420 



Mosquitoes 420 



Two French Mathematical Books. By L. N. G. F. 421 



Our Bookshelf 422 



Letters to the Editor:— 



Submerged Valleys and Barrier Reefs. — Prof. W. M. 



Davis 423 



Uniformity in Radio-active Nomenclature. — Prof. E. 



Rutherford, F. R.S 424 



Radio-activity and the Age of the Earth.— Dr. F. C. S. 



Schiller 424 



Pianoforte Touch.— Dr. F. J. Allen 424 



A Mechanical Vacuum-Tube Regulator. — A. A. 



Campbell Swinton 425 



The Crossing of Water by Ants.— Dr. John C. Willis 425 

 Ethnographical Works. {Illustrated.) By W. W. 



Skeat 425 



The Brilliant Fireballs of June 14. By W. F. 



Denning 427 



The State and Medical Research 428 



Sir Jonathan Hutchinson, F.R.S 429 



Notes 429 



Our Astronomical Column : — 



Astronomical Occurrences for July 434 



Minor Planets 434 



Cordoba Catalogue of 5791 Stars 434 



The Milky Way and the Distribution of Stars with 



Peculiar Spectra 435 



The Microscope Substage and its Adjustments . . 435 



Australian Meteorology. By E. G 435 



The Research Defence Society 436 



The Belfast Memorial to Lord Kelvin. (Illustrated.) 436 



University and Educational Intelligence 439 



Societies and Academies 440 



Books Received 445 



Diary of Societies 444 



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