H'3^^ 



TRANSACTIONS 



OF TUE 



AMERICAN PHILOSOPHICAL'i'S 



^t' L> Uu 



i^il ^^ 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



VOLUME XXI— NEW SERIES 



PART V 



Article Y — A Search for Fluctuations in tlie Suii'H Thermal Radiation Through Their 

 Influence on Terrestrial Temperature. By Simon Newcomh. 



^hilaxlelphia: 

 THE AMERICAN PHILOSOPHICAL SOCIETY 

 104 South Fifth Street 

 190S 



