NO. 15 TEMPERATURES AND SOLAR RADIATION ABBOT 



who with the cooperation of the University of Rochester, the Eastman 

 Kodak Co., and other friends will undertake tests of the automatic 

 measurement of ultraviolet solar rays at high altitudes. 



In order to more thoroughly buttress the proposition that solar 

 variation is a major factor in the temperature changes of terrestrial 



Fig. 2. — Oppositeness of temperature departures at Potsdam which follow average 

 rising and falling sequences of solar variation. 



weather, I undertook, with the cooperation of the late C. F. Talman, 

 meteorologist and librarian of the United States Weather Bureau, a 

 study of the weather of Potsdam, Germany, similar to that I made 

 for Washington and other stations. The year 1935 was not available, 



