WHOLE VOL. NOTES. EUROPE 3 1 



ITALY 

 MILANO (MILAN) 

 Authority. 



Osservazioni Meteorologiche Fatte Nel R. Osservatorio Astro- 

 nomico di Brera, Milan, 

 Pressure. 



Observations taken at (^^, 15'', 21^, during 1931 and 1932. Hours 

 of observation changed December i, 1932, to 8'\ 14'', 19''. 

 Temperature. 



Observations are means of ;|(9^ + 2i'' + Max. + Min.). On De- 

 cember I, 1932, this was changed to ^ (8" +19'' + Max. + 

 Min.). 



NETHERLANDS 

 DEBILT 

 Authority. 



Koninklijk Nederlandsch Meteorologisch Instituut, De Bilt. Con- 

 tinuation of observations at Utrecht-De Bilt. 



NORWAY 



Authority. 



Det Norske Meteorologiske Institutt, Dr. B. J, Birkland, Direc- 

 tor, Oslo, 



Temperature. 



In the earlier volumes and presumably for this volume the means 

 of temperature for the Norwegian stations were obtained by 

 the formula m = n — k {n~'i\im.) , in which n is the mean of 

 three daily observations (8'\ 14^', and 2o'\ 15th meridian E. 

 since 1903) ; Min. is the mean of the daily minima; and k 

 is a factor which differs for each month, (See Koppen 

 formula, Smithsonian Misc. Coll., vol. 79, p. 55,) 



BERGEN II (FREDRIKSBERG) 



Pressure. 



From January 1926 to December 1940 a correction was applied 

 to reduce the pressure from a height of 44.4 m. to 17.4 m. 

 For the winter half year (October to April) the correction 

 applied was -f2.4 mm.; for the summer half year (May to 

 September) it was +2.3 mm. 



