





SCIENCE PROGRESS 



A QUARTERLY REVIEW OF 

 SCIENTIFIC THOUGHT, WORK & AFFAIRS 



No. 45. JULY 1917 



CONTENTS 



RECENT ADVANCES IN SCIENCE: Philosophy (H. Elliot)- 

 Mathematies (P. E. B. Jourdain)— Astronomy (H. S. Jones)— 

 Physics (J. Rice)-Physieal Chemistry (Prof. W. C. MeC. 

 Lewis, D.Se.)— Inorganic Chemistry (C. S. Garrett, D.Sc.)— Or- 

 ganic Chemistry (P. Haas, D.Se.)- Geology (G. W. Tyrrell)- 

 Mineralogy and Crystallography (A. Scott, D.Se.)- Botany 

 (E. J. Salisbury, D.Se.) -Zoology (C. H. O'Donoghue, D.Se.)— 

 Anthropology (A. G. Thaeker) 



ARTICLES: Origin of the Solar System (H. Jeffreys, M.Sc.)— The 

 Gelation of the Natural Emulsoids (S. C. Bradford, B.Se.)— 

 History in Tools (Prof. W. M. Flinders Petrie, F.R.S., D.C.L.)— 

 The Relationship of the Most Ancient Flint Implements to 

 the later River-Drift Palseoliths (J. Reid Moir, F.R.A.I.) 



POPULAR SCIENCE : The Eruption of Sakura-jima on January 

 12, 1914 (C. Davison, Sc.D., F.G.S.) 



NOTES: "Science Progress" — Emil von Behring (Prof. A. S. 

 Loyton)— Prof. Count Morner— The Choice of Our Rulers (Prof. 

 J. Wertheimer)— Types : Radicals and Tories— The Song of the 

 Ion (Cloudesley Brereton)— The Empire's Assets and How 

 to Use them— The Shakespeare Association— Pamphlets and 

 Periodicals— This and That 



ESSAYS: The Theory of Numbers (L. J. Mordell)— Mr. J. H. 

 Gurney's Solution of Quartic Equations (A. S. Pereival)— Some 

 of the Evolutionary Consequences of War (R. C. Maefie, LL.D.) 

 —Thoughts on Modern Literary Criticism (The Editor) 



ESSAY-REVIEWS : A Great Philosopher (C. A. Mereier, M.D.)— 

 Parasites of Men (A. Porter)— Temperaments (The Editor) 



REVIEWS: Alfred Russel Wallace — Theory of Knowledge— 

 Theosophy— Mathematical Analysis— Hindu Art of Reckoning 

 —Theoretical Physics— Practical Physics -Heat— X-Rays— Pure 

 Organic Compounds— Flints -Economic Geology— Algae— Plant 

 Teratology — Instincts of the Herd— Cruise in the Tomas 

 Barrera— Horses— Arboreal Man- The Flying Machine— Ray- 

 mond— and other Reviews 



EDITOR 



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

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



LONDON : JOHN MURRAY, ALBEMARLE STREET, W. 



Price 5/- net 



VOL. XII 



