SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 

 _ 1034 



Atmospheric Actinometry 



AND THE 



ACTINIC CONSTITUTION OF THE ATMOSPHERE. 



BY 



E. DUCLAUX, 



Professor of Physics in the Agronomical Institute, Paris. 



CITY OF WASHINGTON : 

 PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



1896. 



.'y. 



