SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



PART OF VOLUME XXXIV — ^ 



Ibobgftins Jfuiib 



A CONTINUOUS RECORD OF 

 ATMOSPHERIC NUCLEATION 



BY 



CARL BARUS 



HAZARD PROFESSOR OF PHYSICS IN BROWN UNIVERSITY, PROVIDENCE, R. I. 



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T Bk.Xl5 





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(No. 1651) 



CITY OF WASHI^'GTON 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION 



1905 



