SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



FART OF VOLUME XXXIV 



Ibobglnns Jfunb 



A CONTINUOUS RECORD OF 

 ATMOSPHERIC NUCLEATION 



BY 



CARL BARUS 



HAZARn PKOKESSOR OF PHYSICS IN BROWN UMVKRSITY, TROVIDENCF., R. I. 



(No. 1651) 



CITY OF WASHINGTON 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1905 



