NO. 3 EFFECT OF SOLAR RADIATION CLAYTON 7 



tion coefficient for the mean of five days was computed in the same 

 way as for the preceding results, and the correlation factors are given 

 in the last line of table 3. 



The maximum correlation factor is nearly five times larger than 

 the probable error, but is smaller than the correlation factor in the 

 case where maximum temperatures alone were used. 



CORRELATION OF SOLAR RADIATION WITH TEMPERATURE IN 

 VARIOUS PARTS OF THE WORLD 



The results obtained from Pilar were so favorable that it was 

 decided to extend the computation to observations made in other 

 parts of the world using the departures of the daily maxima of 

 temperature as explained in the case of Pilar. See chart 8. 



For this purpose data were obtained from the following publi- 

 cations : 



Anuario Meteorologico, Chile, 1913. 



Monthly Weather Review, United States, Vols, i to 13, 1913. 



Observations from British Colonies, 1913, reprinted from Colonial " Blue 

 Books " — Nigeria, Uganda, Nyasaland, Seychelles, Bermuda, Jamaica, George- 

 town, Mauritius, Fiji, Hong-Kong, Gambia. 



Report of the Meteorological Service of Canada, 1913. 



Osservazioni Meteorologische y Geofisiche fatte nel R. Osservatorio Astro- 

 nomico di Brera in Milano, 1913. 



Meteorologische Beobachtungen Angestelt in Jurjew (Russia), 1913. 



Meteorologiske laktagelser i Sverige, 1913. 



Danske Meteorologiske Aarbog 2 den Del Feroerne, Island, Gronland og 

 Vestindien, 1913. 



Boletin Mensua! de la Seccion Meteorologica del Estado de Yucatan 

 (Mexico), 1913. 



Boletin Mensual del Observatorio del Ebro, 1913. 1 



Bulletin of the Philippine Weather Bureau, 1913. 



The means of each successive five days were obtained for each 

 set of observations, and the correlation factors calculated by compari- 

 son with the mean values of solar radiation as given in part 2 of 

 table 4.' 



Calculating first the factor for Arica, Peru, similar results to 

 those of Pilar were found. Then computing the results for Kingston, 

 Jamaica, a station somewhat north of the equator, a positive corre- 

 lation resulted as was the case also for Roswell, N. M., a continental 

 station in the southern United States, about the same latitude north 

 as Pilar is south of the equator. 



The computations were next made for San Francisco and San 

 Diego, California, and showed a marked negative correlation. The 



* Note. Table 4 is omitted in the English text. 



