c, 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 139, NUMBER 10 



WATER TRANSPARENCY 



OBSERVATIONS ALONG THE EAST 



COAST OF NORTH AMERICA 



(With 2 Plates) 



By 



JEROME WILLIAMS 



E. R. FENIMORE JOHNSON 



AND 



ALBERT C. DYER 



(Publication 4391) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



OCTOBER 26, 1960 



