WHOLE VOL. NOTES. SOUTH AMERICA 



57 



Precipitation. 



The precipitation records are in millimeters, and there is no 

 concrete information regarding the exposure of the rain 

 gage. During eight months, the observations were incom- 

 plete. The normals for these months have been inserted to 

 complete the series, which comprises 35 years. When the 

 amount of rain recorded was less than 0.5 mm the letter T.= 

 " trace " has been inserted. 

 Remarks. 



This is a new station, and the data are given in part III beginning 

 with 1918. 



YACUIBA 

 Authority. 



Direccion General de Meteorologia, Geofisica e Hidrologia, 

 Buenos Aires. 

 Site. 



This is a station on the Argentine-Bolivian frontier. The ex- 

 posure of the instruments is described as good and the 

 country around open. 

 Temperature. 



The data are derived from direct observations taken at 8 h , 14'', 

 and 20 h , corrected to the mean of 24 hours from hourly 

 values referring to the Argentine station of Ingenio Espe- 

 ranza (Lat. 24 5' S., Long. 64 50' W., height 558 m), 

 where the thermal and seasonal rainfall conditions are very 

 similar to those prevailing in Yacuiba. The corrections 

 applied to the data to reduce to mean of 24 hours were as 

 follows : 



Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Year 

 "C —1.2 — 1.1 —0.9 — 0.0 —0.8 —0.0 —1.1 —1.2 —1.3 —1.4 —1.3 —1.3 —1.1 



The observations are lacking during 15 months in the 17 

 years, the missing values being filled in after a study of the 

 temperature data available from Argentine stations to the 

 south of Yacuiba. In a lew of the months the data are 

 incomplete. 

 Precipitation. 



The rain gage is on a post with its mouth 1.4 m above the ground. 

 3 



