ISTETW 



VOL. LXXXX. 



THE NEW PHYSICS AND ITS EVOLUTION. 



By LUCIEN POINCARE. 



Edited by F. LEGGE, 



' Many books of this kind have been written, but few indeed, 

 if any, which put this complex, many-sided matter with equal 

 precision and sound learning. The volume cannot but prove highly 

 serviceable to readers who wish a quick and reliable introduction 

 to a special knowledge of the recent advancement in natural 

 science. ' SCOTSMAN. 



' It is the work of a competent man of science, and the 

 information in it is correct and precise.' LIVERPOOL COURIER. 



' The comprehensiveness of the author's work renders it of 

 value, for it presents with admirable clearness the main broad 

 lines of physical development, and affords a most useful and 

 much-needed clue to the apparent intricacies of modern research. ' 

 THE BRITISH MEDICAL JOURNAL. 



VOL. LXXXXI. 



THE FORCES OF NATURE. 



By DR. LE BON. 



Crown 8vo. Price 5s. 



VOL. LXXXXII. 



THE RADIO-ACTIVE SUBSTANCES, 



Their Properties and Behaviour. 



By WALTER MAKOWER, 



(Assistant Lecturer in Physics at the Victoria University of Manchester.) 



This book gives an easily understood account of the latest 

 experiments and theories regarding radium and the various sub- 

 stances related to it. Special attention is paid in it to the author's 

 own discovery of the effect of high temperatures on radium 

 emanation. 



Several further volumes are in preparation, and will be issued 

 immediately. 



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