WHOLE VOL. NOTES. NORTH ATLANTIC 8l 



Heights of thermometers above ground were: 1872-1887, 44 ft.; 

 1888. 58 ft. ; 1889-1906, 59 ft. ; 1907. 4-' ft. ; i()o8-i923, 62 ft. ; and of 

 rain gage, 1870-1871, 53 ft.; 1872-1888. 51 ft. ; 1889-1923, 42 ft. 



NORTH ATLANTIC 

 AZORES 



HORTA 



Authority. 



Servigo Meteorologico dos Agores, Punta Delgada, San Miguel, 

 Agores. 

 Pressure. 



Site: The height of the barometer cistern above Mean Sea Level 

 was : 



1902 to 19 14 28 m. 



1915 to 1923 65 m. 



All values have Ijeen corrected to Mean Sea Level by apply- 

 ing the following corrections : 



1902 to 1914 + 2.6o mm. 



1915 to 1923 . +5-86 mm. 



lustnimcnt: The pressure values are obtained from a barograph 

 controlled by readings of a standard barometer 

 read 5 times a day. 

 Hours: The values are the means of hourly readings from the 



barograms. 

 Notes: All values have been corrected to ncjrmal gravity (Lat. 

 45°) by api)lying a correction of —0.45 muL 

 Temperature. 



Site: The height of the thermometer screen al)Ove Mean Sea 

 Level was : 



1902 to 1914 31 '"• 



1915 to 1923 ^H '^i- 



Hours: From 1902 to 1907 the temi)erature values are from 

 observations of a standard thermometer at 9'', 

 12'', 15'% 21'', corrected to the mean of 24 hourly 

 readings by the following corrections, based on 

 hourly values 1908 to 1924: 



Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. 



•C. —0.45 — 0..03 — O.e.--) —0.73 — 0.8C —0.91 —1.10 —1.05 — T.07 —0.79 —0.50 —0.49 



From 1908 to 1924 the values are the means of the 

 24 hourly readings from a thermograph, compared 

 with a standard thermometer 5 times a day. 



