WHOLE VOL. NOTICS. AKmCA 17 



rca(liii,i;s, llie mean hcint,^ calculated according to 

 the followini;- formula: 



j(8''-hi4'^ + 2o''fMin.) 

 and reduced to the true means of 24 hours hy aj)- 

 ])]yin,2; the following- corrections: 



.lati. FpI). Mar. Apr. May June July .\"R. Rii>t. Oct. Nov. Dec. 

 "0 4 0.8 4 0.9 4 0.8 4-0.9 -F0.8 4-0.6 4-0.6 -t-0.5 +0.5 4-0.6 4-0.6 -1-0.7 



1906 to 1920. The values are the means of 24 hourly read- 

 ings from the thermograi-)h controlled by eye obser- 

 vations at 8''. 14'' and 20''. 



1921 to 1922. As for K)04 to 1905. 



rRKCIPITATION. 



The height of the rim of the rain gage aljove the ground was 

 T.o m. 



JOHANNESBURG, SOUTH AFRICA 

 Authority. 



Meteorological ( )f"tice, L)c]xirtment of Irrigation, l'rett)ria, L'nion 

 of South Africa. 

 Pressure. 



Site: The observations were taken at the Observatory ; the 



height of the barometer cistern al)ove Mean Sea 



Level was 5925 ft. througliout the ])eriod { [904 to 



1924). 



Hours: The hour of observation was f)V' (Jreenwich Mean Time 



throughout the period. 

 Azotes: All values have been corrected to normal gravitv (Lat. 



45°)- 

 Temterature. 



Site: As for Pressure. 



Mean: The standard adopted is the mean l)et\veen the mean 

 daily maximum and mean daily minimum. 

 Precipitation. 



Site: The observations were taken at Joubcrt Park ; the height 

 above Mean Sea Level was 5.750 ft. 



KHARTOUM, ANGLO-EGYl'TrAN SUDAN 



Authority. 



Physical Department, Ministry of Public Works, Cairo, Egypt. 

 Pressure. 

 Site: 



1903 A])ril to 1910 December. At the Military Hospital. 

 1908 January to 1922 December. At Gordon College. 



