WHOLE VOL. NOTES. AFRICA 21 



Temper.\ture. 

 AutJiorities: 



1891-1900. As for Pressure. 



1 901 -1902. Manuscript data supplied by the Survey Depart- 

 ment, Lagos, and liled in the iMeteorological Office, 

 London. 

 1903-1920. As for Pressure. 

 Site: As for Pressure. 

 Obserz'ations: 



The standard adopted is the niean oi the mean daily maxi- 

 mum and mean daily minimum. These figures were 

 unreliable or wanting in certain months and the 

 values in italics have been computed from the fixed 

 morning hour of observation by means of the fol- 

 lowing corrections obtained from a number of the 

 most reliable records : 



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

 8" °F. 4S.S +2.8 -I l.i> +0.8 +0.8 +1.0 +1.2 +0.8 tO.T. +0.8 +1.8 +8.0 



9" 'K. +2.6 +2.1 +1.0 +0.2 +0.S +1.0 +1.6 +1.4 +0.9 +0.8 +1.4 +2.3 



Precipitation. 



Authorilies: As for Pressure. 

 .S7/^; As for Pressure. 



C)\>KI1':P. SCX^TIJ A1<KK\\ 



-VUTIIORITV. 



Meteorological ( '•ffice. Department of Irrigation, Preti>ria, I'nicm 

 of South .\frica. 

 Pressure. 



Site: 'Phe height of the barometer cistern above .Mean Sea 

 Level was : 



1900 to 1911) J uly 3035 ft. 



1919 September to ig-'4 ^^oh>.> ft. 



The values [or 1919 September to u)_'4 lia\e been correcteil 

 to a height of 3035 ft. by applying a ci)rreetion of 

 + .024 ill. 

 Hours: The hour of observation was (>!'' (ireenwicli Mean Time 



throughout the period. 

 Xotcs: All values have bein eoirecled to uotinal gravity (l.at. 

 45'A h\ appKiiig a eorrectiou of .0-\\ in. 

 Temperature. 



Site: As for Pressure. 



Mean: The staiuhuil adopted is the mean between the mean 

 claiK' UKLxiiimni and the mean dailv iiiiniiiuiiii. 



