SCIENCE PROGRESS 



A QUARTERLY REVIEW OF 

 SCIENTIFIC THOUGHT, WORK & AFFAIRS 



No. 51. JANUARY 19 19 



CONTENTS Vi£ 



RECENT ADVANCES IN SCIENCE: Mathematics (P. E. B. 

 Jourdain) — Astronomy (H. S. Jones) — Physics (J. Rice) — 

 Physical Chemistry (Prof. W. C. McC. Lewis, D.Sc.) -Organic 

 Chemistry (P. Haas, D.Sc.)- Geology ( G. W. Tyrrell) Crystal- 

 lography (A. Scott, D.Sc.)— Botany (R. J. Salisbury, D.Sc.) 

 - Plant Physiology (W. Stiles) — Zooldgy (Prof. C. H. 

 O'Donoghue, D.Sc). 



ARTICLES : Sup la Loi de l'Evolution Irreversible (B. Pet- 

 ronievics, Ph.D.)— The Geological Aspects of the Coral-Reef 

 Problem (Prof. W. M. Davis, Ph.D., Sc.D.). 



POPULAR SCIENCE : Science and the International Language 

 (E. B. R. Prideaux, M.A., D.Sc, and H. C. Prideaux, M.A.). 



CORRESPONDENCE : Professor Elliot Smith's Views on Flint 

 Implements (J. Reid Moir)-The Discovery of New Parts in 

 Archaeopteryx (B. Petronievics). 



NOTES: Poem: Death is Everywhere (Cloudesley Brereton)— 

 The Organisation of the Women's Vote (Lady W. Cowan) -A 

 New Monthly Botanical Journal (M. C. Stopes, D.Sc)— Notes 

 and News (D. Orson Wood, M.Sc)— and other Notes. 



ESSAYS: Science in Education (Prof. E. H. Starling, C.M.G., 

 F.R.S.)— Physical Relativity Hypotheses Old and New (G. W. 

 de Tunzelman)— The Electrification of Seeds (C. Mercier, 

 M.D., F.R.C.P.)— Isosceles Trigonometry (Sir Ronald Ross.)^ 



ESSAY-REVIEWS: Maternity and Child Welfare (T. N. Kely- 

 naek, M.D.). 



REVIEWS: History of Science— Navigation and Nautical Astro- 

 nomy Stars— Dynamical Astronomy -Relativity Theory of 

 Gravitation — Temperature — Coal-Tar Dyestuffs — Electro- 

 metallurgy—Coal and its Scientific Uses— Plant Products and 

 Chemical Fertilisers — Plant Physiology — Plant Genetics- 

 Phytopathology— Alternating Current Electrical Engineering 

 —Life and Letters of Sir Joseph Hodker-and other Reviews. 



EDITOR 



I SIR RONALD ROSS, K.C.B., K.C.M.G., F.R.S., N.L., 



D.Sc, LL.D., M.D., F.R.C.S. 



' LONDON : JOHN MURRAY, ALBEMARLE STREET, W. 



Price 5/- net 



VOL. XIII 



