SCIENCE PROGRESS 



A QUARTERLY REVIEW OF 

 SCIENTIFIC THOUGHT, WORK & AFFAIRS 



No. 53. JULY 1919 

 CONTENTS 



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

 dain)— Applied Mathematics (S. Brodetsky) -Astronomy (H. S. 

 Jones)- Physics (J. Rice)- Physical Chemistry (Prof. W. C. 

 McC. Lewis, D.Sc.) — Organic Chemistry (P. Haas, D.Sc.)— 

 Mineralogy (A. Scott, D.Sc.)— Botany (E. J. Salisbury, D.Sc.) 

 — Plant Physiology (I. Jorgensen) — Zoology (Prof. Ch. H. 

 O'Donoghue, D.Sc). 



ARTICLES : The Water Economy of Maritime Plants (T. G. Hill, 

 A.R.C.Sc, F.L.S.)— Some Palaeolithic Problems (H. Bury, M.A., 

 F.G.S.). 



POPULAR SCIENCE : Some Scientific Aspects of Cold Storage, 

 Part II. (Ingvar Jorgensen, Cand. Phil., D.I.C., and Walter 

 Stiles, M.A.). 



CORRESPONDENCE : The Internal Ear (Sir T. Wrightson)-The 

 Ice- Age Question (H. S. Jones, B.Sc). 



NOTES : Prof. G. Carey Poster, F.R.S. (A.W.P.)-The Mittag-Leffler 

 Institute (P. E. B. Jourdain)— The Present Position of Wire- 

 less Telephony (P. R. Coursey, B.Sc.)— Medico-Political Union 

 —The League of Red Cross Societies— The Royal Horticultural 

 Society— Notes and News (D. O. Wood, M.Sc, and J. Gatenby, 

 D.Sc). 



ESSAYS : The Uses of Weeds and Wild Plants ( W. E. Brenchley, 

 D.Sc)— War : A Plea for Scientific Research, Part II. (Major- 

 Gen. Charles Ross, C.B., D.S.O.)— A Plea for the Teaching of 

 General History (E. H. Short). 



ESSAY-REVIEWS : The Nature of Number (J. C. Gregory, B.Sc) 

 —Agricultural Economics in England and Denmark (W. Stiles, 

 M.A.) 



REVIEWS: Gyrostatics and Rotational Motion — Algebra of 

 Quanties— Solid Geometry— Binary Stars— Sun's Radiation- 

 Australian Environment— Mirrors, Prisms and Lenses— Phy- 

 sical Chemistry— Osmotic Pressure— Colouring Matters— Coal- 

 tar Dyes— Geometrical Crystallography— Symmetry— Evolution 

 of Life -Gene tics in Agriculture— Psycho-analysis— Diet and 

 Endurance— Library Ideals— Education in India— and other 

 Reviews. 



EDITOR 



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



ASSISTED BY 



D. ORSON WOOD, M.Sc, A.R.C.Sc, and 

 1 J. BRONTE GATENBY, B.A., B.Sc. 



LONDON : JOHN MURRAY, ALBEMARLE STREET, W. 



Price 6j- net 



VOL. XIV 



