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. 



