ABBOT: SOLAR RADIATION MEASUREMENTS 235 



The cost of a solar radiation station need not exceed $25,000, 

 and its upkeep $10,000 per annum. Since the accuracy of the 

 determinations of the solar variations would be enhanced by 

 uniformity in the methods of observing, it is quite desirable that 

 the measurements at the several stations should be made under 

 a common control and direction. 



The methods of observing and reducing have been devised 

 and perfected at the Smithsonian Institution but they would 

 very willingly be communicated to any international organiza- 

 tion which was prepared to take up measurements of the "solar 

 constant." On the other hand, if the Smithsonian Institution 

 had the means, preferably $1,000,000, to devote to the subject, 

 it would be practical for the Institution to carry on "solar 

 constant" determinations in perpetuity in such a manner as to 

 afford a satisfactory groundwork for any application of them 

 which meteorologists may wish to make hereafter. 



