92 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 79 



1872 December to 1881 +0.8 mm. 



1882 January to 1923 +1.6 mm. 



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

 are the mean vakies of 3 to 6 observations a 'day. 

 The diurnal variation is negligible in comparison 

 with the variation from month to month. 

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

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

 Temperaturi:. 



Hours: The hours of observation were as follows: 



1872 December to 1874 March. 8'' November to March. 

 7^ April to October. 

 I.J 1874 April to 1883. 8'' November to April. 7'^ May 

 to October. 

 1884 to 1923. 8'\ 



2. 1872 December to 1923. I4'\ 



3. 1883 November to 1923. |(8"+i4'0- 



Notes: About 1890 the temperature seems to have undergone 

 some change in the months of April to September. 

 The cause of this change is unknown. 

 Precipitation. 



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



GRIMSEY 

 Authority. 



Section Meteorologique de Loggildingarstofan, Reykjavik, 

 Iceland. 

 Temperati'RE. 



Site: The height above Mean Sea I.evel was 22 m. 

 Hours: The hours of observation were as follows: 



(i ) 8'' throughout the period (1874 July to 1923). 



(2) 14'' throughout the period. 



(3) 2(8" + i4'0 throughout the period. 

 Precipitation. 



The height of the rim of the rain gage above the ground is 1.9 m. 



STYKKISHOLM 

 Authority. 



Section Meteorologicjue de Loggildingarstofan, Reykjavik, 

 Iceland. 



