SMITHSONIAN CONTRIBUTIONS TO KNOWLKDGI 



1 1 1 :; 



1f3o&Ghins Jfunb 



ON THE ABSORPTION AND EMISSION OP 



AIR AND ITS INGREDIENTS FOR LIGHT OF 



WAVE-LENGTHS FROM 250.. TO 100.. 



nv 



VICTOR SCHUMANN 



CITY OF WASHINGTON 

 PUBLISHED I5Y THE SMITHSONIAN INSTITUTION 



1903 



