SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 98, NUMBER 5 



UTILIZING HEAT FROM THE SUN 



(With Four Plates) 



BY 



C. G. ABBOT 



Secretary, Smithsonian Institution 



f^%m\M wsriri 



(Publication 3530) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



MARCH 30, 1939 



