WHOLE VOL. NOTES. EUROPE 57 



earlier years preceding July 1874 as less reliable owing to 

 less frequent checking of instruments and observations. 



For the years 1896- 1920 the means are taken from our own pub- 

 lication " Meteorologiska iakttagelser i Sverige." These 

 pressure means have been corrected for gravity and such 

 instrumental corrections applied as inspection since their first 

 publication have shov/n to be needed. 

 Temperature. 



The heights of the thermometers aliove the ground at Haparanda 

 have varied somewhat l)ut mostly have remained between 

 2 and 4 m. 



UPS ALA 

 Hours of Observation. 



The pressure and temperature means at Upsala since June 1865 

 have been based on 24 hourly observations. 

 Pressure. 



The height of the barometer above sea level has been 24.0 m. 

 since Octolier 1865. Previously it was at a height of 20.8 m. 

 but the means have all been reduced to 24.0 m. During the 

 years 1855-1862 the observation hours were 7'\ 14'^ and 21''. 

 After 1863 they were at 8'\ 14'^ and 21'^ and the means in 

 both cases were the means of the three oliservations. 

 Temperature. 



The temperature means for the years 1855-1862 were computed 

 by the formula | ( 7''-!- i4''-f 21'' + 2i'M. From January 1863 

 to May 1865 the observation hours were 8*^, 14'' and 21'^ and 

 the temperature means were calculated by Ekholms formula. 



The height of the thermometers above the ground has during the 

 entire time remained at about 1.3 m. Since October i8<')5 

 the position has not changed. 



In the Upsala-Bulletins of 1888 it was noted that the barometer 

 figures of October 1879 to Decemljer 1888 were 0.4 mm. 

 too low. This correction has been made. I'esides the gravity 

 correction, no other corrections have been made to the values 

 given in the L'psala P.tilletins. 



SVVrrZERLy\NT) 



SANTIS 

 Authority. 



Swiss Meteorological Service. 

 Site: 



The meteorological observatory is located on the highest point of 

 the Santis mountain, 2500.1 m. above sea level. From 



3 



