CONTENTS 



PAGE 



i. THE CONDITIONS OF RUSSIAN AGRICULTURE. . 175 

 J. Vargas Eyre, Ph.D. 



{Illustrated. ) 



2. THE STRUCTURE OF METALS. The Influence of 



Mechanical Treatment on Structure . . . .194 



Cecil H. Desch, D.Sc, Ph.D. 

 {Illustrated^) 



3. THE PLANET MARS. Part II 212 



James H. Worthington. 



4. THEORIES AND PROBLEMS OF CANCER. Part III. . 223 



Charles Walker, D.Sc, M.R.C.S., L.R.C.P. 



5. THE DEATH-RATE OF EARTHQUAKES . . . .239 



Charles Davison, Sc.D. F.G.S. 



6. THE CHEMICAL ACTION OF LIGHT ON ORGANIC 



COMPOUNDS 251 



W. A. Davis, B.Sc. 



7. HORTICULTURAL RESEARCH 280 



Spencer Pickering, F.R.S. 

 {Illustrated.) 



8. THE RELATION OF MIND AND BODY . . . .292 



J. S. Haldane, M.D., LL.D., F.R.S. 



iii 



