WHOLE VOL. NOTES. SOUTH AMERICA 63 



level of 9.10 m, a correction of +0.5 mm has been applied 

 to the monthly means. A correction of —2.0 mm has been 

 applied to reduce the pressure to gravity at Lat. 45 °. 



Temperature. 



The thermometer was 1.41 m above the ground from October 1, 

 1911, to June 30, 1912; from July 1, 1912, to the present 

 time it has been 1.27 m above the ground. 



Precipitation. 



The amount of rainfall was determined from the mean of two 

 readings made respectively on a Herve Mangon and a Ville 

 de Paris pluviometer, both situated at the same height above 

 sea level. 



Remarks. 



This is a new station beginning with 19 12, and the data are given 

 in part III. 



CHILE 



Authority. 



Instituto Central Meteorologica y Geofisico de Chile; Oficina 

 Meteorologica de Chile (since 1928). 

 General Remarks. 



Until the end of 1928 the observations continued to be made at 

 the same hours as those employed since January 191 1, when 

 the " Instituto Central " was established. In the course of 

 the year 1928 the Supreme Government of the Republic 

 decreed that the service should be amplified under the direc- 

 tion of the Ministry of Marine. 



The data 1921 to 1929, except the mean hourly temperature at 

 Magallanes (Punta Arenas) until 1927, were taken from' 

 publications Nos. 33, 34, 35, 36, and 38 of the Instituto 

 Centra], and 39, 40, 41, and 42 of the Oficina Meteorologica 

 (Santiago 1923 to 1932), while the observations for 1930 

 were kindly sent in MS. by the new Director, Capt. German 

 Valenzuela, to complete the decade. 

 Hours of Observation. 



From September 1927 the hours of observation refer to the 75th 

 meridian instead of that of Santiago, viz., 70 42' W. 

 hitherto the standard ; summer time was also introduced. 



