PREFACE TO THE NEW EDITION. 



LEAVING the general features of " In Starry Kealms " 

 unaltered, I have endeavoured to correct the present 

 edition and bring it, as far as possible, up to date. 

 This has been particularly necessary in the chapters on 

 "Showers of Shooting Stars" and on "Photographing 

 the Stars," but the latter subject would now need 

 volumes to itself. Probably the recent discoveries in 

 Radio-Activity will, at no distant date, cause some 

 modification to be required in our present views as to 

 the sustentation of the sun's heat. At present, however, 

 there is no adequate reason for making any alteration 

 of moment in the chapters here given on this subject. 



ROBERT S. BALL. 



CAMBRIDGE, 



21st August, 1906. 



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