Il6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 79 



are the means of 7'\ 14'^ and 21'' reduced to the mean of 

 24 hours. The corrections used are as follows : 



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

 7'', 14", 22'" —0.24 —0.17 —0.03 0.00 0.00 0.00 +0.10 —0.00 —0.05 —0.13 —0.13 —0.18 



7'', 14'', 21" —0.40 —0.30 —0.20 —0.10 —0.10 —0.10 0.00 —0.10 —0.20 —0.20 —0.30 —0.40 



The apparent anomaly in the corrections to the mean of 24 hours 

 is due to the circumstance that the earlier series, 1861 to 1892, 

 were derived from term day observations. The corrections 

 for 1916 to 1921 were derived from hourly values given in 

 publications Nos. 5, 7, ii, 17 of the Instituto Central 

 Meteorologico y Geofisico de Chile for the years 1911 to 

 1914. 

 Temperature. 



Tlie hours of observation were the same as for the pressure and 

 the mean values for the intervals 1861 -1892, and 1916 to 

 192 1 were corrected to the mean of 24 hours. The other 

 means were derived from hourly observations. 



COLOMBIA 



BOGOTA 

 Rainfall, 



Antliority: Observatorio Nacional de San Bartolome. Report of 

 Pan American Congress, Washington, 1916. Noticia del 

 nuevo observatorio con algunos datos sobre la climatologia y 

 el magnetismo de Coloml)ia. 



DEMARARA 



GEORGETOWN 

 Pressure. 



Aitthorily: The Science and Agriculture Department, George- 

 town, Demarara, British Guiana. 

 Site: The height of the barometer cistern al)ove Mean Sea Level 



was 6 ft. throughout the period (1887 to 1924). 

 I)isfniiiient: 



1887 to 1923 October 15. A Fortin barometer No. 2194 was 



in use. 

 1923 October 16 to 1924. A Kew Pattern ])ar(»meter No. 

 1540 was in use. 

 Hours of Observation: 



1887 to 1907. December. 9'' and 16''. 

 1907 December to 1913 June, (/'and \y^\ 

 1913 July to 1924. f\ 13'', and 18''. 



The values 1887 to 191 3 June, have been corrected to the 

 mean of 7'', 13'', and 18'' by the following correc- 



