WHOLE VOL. NOTES. NORTH ATLANTIC 53 



Notes: All values have been reduced to normal gravity (Lat. 

 45°) by applying a correction of —.070 in. No 

 certificate is available for the barometer, but the 

 following corrections have been determined by 

 comparison with neighboring stations : 



1921 — .013 in. 



1922-1930 — .030 in. 



Temperature. 



Observations: The standard adopted is the mean between the 

 mean daily maximum and the mean daily minimum. 

 Precipitation. 



Site: The ground on which the rain gage stands is 507 ft. above 

 Mean Sea Level. The height of the rim of the rain 

 gage above the ground was : 



1921-1926 2 ft. 



1927-1930 1 ft. 



SAN JUAN, PUERTO RICO 

 Authority. 



United States Weather Bureau, Washington, D. C. 



TRINIDAD 

 Authority. 



Trinidad Blue Books. 

 Pressure. 



The readings appear to becorhe unreliable early in the period 

 1 92 1 -1930 and have been omitted. 

 Temperature. 



Site: St. Clair Experiment Station. 



Observations: The standard adopted is the mean between the 

 mean daily maximum and the mean daily minimum 

 reduced to the mean of 24 hours by the following 

 corrections : 



The value for 1922 December was computed from 

 the mean of the readings of the dry bulb at 7 h and 

 15 11 by applying a correction of — o.6° F. 

 Precipitation. 



Site: The height of the ground on which the rain gage stands 

 is 6y ft. above Mean Sea Level. 

 The height of the rim of the rain gage above the ground was : 



1921-1927 March 2 ft. 8 in. 



1927 April-1930 1 ft. 



