230 



ABBOT: SOI.AR RADIATION MEASUREMENTS 



most exclusively to Argentine weather stations, and mainly to 

 Buenos Aires. 



Clayton carries on the study of what happens after a change 

 in solar radiation for many days, sometimes even 40 days after 

 the event. This leads to the surprising result that the largest 

 effects come not 3 days, but even 10 days and 17 days after the 

 event. As he has shown this result clearly by the ordinary 

 method of graphical comparison, not involving mathematical 

 correlation coefficients, I am able to show you the result with 



2 4 6 8 10 12 24 16 

 DAys Elapsed ArTzn. Solar Obsebvation. 



'n 



20 



Fig. I. — Curves showing departures from mean temperatures at Buenos Aires. 



perfect simplicity in figure i, which I have re-drawn on the 

 Fahrenheit scale from his table II. Three curves are shown 

 representing the average progress of the departures from mean 

 temperatures at Buenos Aires. These cover the 10 days next 

 following dates when the "solar constant" was determined as 

 2.00, 1.95, and 1.90 calories per square centimeter per minute, 

 respectively. The ciu^es give the mean results of the years 



