WHOLE VOL. NOTES. SOUTH AMERICA 55 



SOUTH AMERICA 



ARGENTINA 



Authority. 



Direccion General de Meteorologia, Geofisica e Hidrologia, 

 Buenos Aires. 



Pressure. 



All the pressure values are at o° C, station level, mean of day 

 and Lat. 45 °. In one or two cases, changes of a few meters 

 have been effected in the height of the station, but the corre- 

 sponding monthly values have been reduced to the old height 

 by the application of small corrections. Where hourly values 

 are not available, the means of observations made at 8 h , I4 h , 

 and 20 h have been corrected to the mean of the day. 



Temperature. 



The mean temperature in each instance refers to the mean of the 

 24-hourly values. At stations where these values are not 

 available, the means of the observations made at 8 h , 14 11 , and 

 20 h have been corrected to the mean of the 24 hours. 



Precipitation. 



In general the rain gages are fixed to posts with the mouth of 

 the gage 1.5 m above the surface of the ground. Previous 

 to January 1928, the rainfall month in most cases terminated 

 at 8 a.m. of the last day of the month, but thereafter, the 

 rainfall month refers to the rain recorded up to 8 a.m. 

 of the first of the succeeding month. 



BAHIA BLANCA 



The rainfall totals are those observed at the Meteorological Station. 

 The totals published in volume 18, part 1, of the 'Anales " refer to 

 the Southern Railway Station for the years 1925, 1926, and 1927. 



BUENOS AIRES 



The observations continue to be taken at Charcarita in the suburbs 

 of the city on the grounds of the Agricultural College. 



DIEZ-Y-SEIS DE OCTUBRE 

 The name of this station has been changed to Esquel. 



