50 smithsonian miscellaneous collections vol. 90 



Precipitation. 



The height of the rim of the rain gage above ground is 1.5 m. 



VESTMANNAEYJAR 



Authority. 



Section Meteorologique de Loggildingarstofan, Reykjavik, 

 Iceland. 

 Pressure. 



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



1921 January-August . J.J m 



1921 September- 1 930 13.2 m 



All values have been reduced to Mean Sea Level by applying 

 the following corrections : 



1921 January-August +0.7 m 



1921 September-1930 between +12 mm and +12.4 mm, 

 varying according to the mean dry bulb temperature. 

 This height correction is calculated according to 

 Riihlmann's formula in Jelinck's "Anleitung zur 

 Ausfiihrung meteorologischer Beobachtungen," 

 Wien, Zentral-Anstalt fur Meteorologie und 

 Geodynamik. 

 Hours: The values of pressure do not refer to a fixed hour, but 

 are the mean values of three to six observations 

 per day. The diurnal variation is negligible in com- 

 parison with the variation from month to month. 

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

 45°) by applying a correction of +1.2 mm. 

 Temperature. 



Site: As for pressure. In order to make the observations at the 

 two sites comparable, a correction of +0.7° C. has 

 been applied to the values for 1921 September to 

 1930 December. 

 Precipitation. 



The height of the rim of the rain gage above ground is 1.1 m. 



FUNCHAL, MADEIRA 



Authority. 



Observatorio Central Meteorologico, " Infante D. Luis," Lisbon, 

 Portugal. 



