SMITHSONIAN MISCELLANEOUS COLLEC 



VOLUME 98, NUMBER 19 



r^OWAN ihstItj 



JUl&I 



J 93-9 



►NS 



2**C£ u; \ml 



THE DETERMINATION OF SMALL 

 AMOUNTS OF CHLOROPHYLL- 

 APPARATUS AND METHOD 



(With Two Plates) 



BY 



EARL S. JOHNSTON 



AND 



ROBERT L. WEINTRAUB 



Division of Radiation and Organisms 

 Smithsonian Institution 



(Publication 3545) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JULY 31, 1939 



