whole vol. notes. africa 9 



Precipitation. 



Site: As for pressure, 



DURBAN 

 Authority. 



Meteorological Office, Department of Irrigation, Pretoria, Union 

 of South Africa. 

 Pressure. 



Site: June 1912 to September 1939, Point Signal Station, Lat. 

 29° 52' S., Long. 31° 3' E., H = 50 ft. The coordinates given 

 in previous volumes of World Weather Records refer to the 

 site previous to 1912. October 1939 to December 1940, Air- 

 port, Durban, Lat. 29° 51' S., Long. 31° 3' E., Hb = 42 ft. 

 Temperature. 



Site: 193 1 to December 1938, Point Signal Station (see under 

 pressure) ; January 1939 to December 1940, Airport, Dur- 

 ban. The thermometers are exposed 4 ft. above the ground 

 in a Stevenson screen. 

 Hours: The values from 1931 to December 1938 were corrected 

 throughout as follows : 



Jan. 

 •F. 



'F. 



These corrections were arrived at from a coincident 3^-year 

 series of records at the Point and the Airport, taking into 

 account also the first set of corrections. The values as given 

 are therefore comparable with those appearing in former vol- 

 umes of World Weather Records. 

 Precipitation. 



Site: As for temperature. The height of the rim of the rain gage 

 was 4 ft. throughout the period. No corrections have been 

 made for change of site. In this connection it is necessary to 

 point out that there is a close agreement between the precipi- 

 tation at the Airport, Durban, and at the site previous to June 

 1912. Precipitation at the Point Signal Station (June 1912 

 to December 1938), however, is appreciably higher, and the 

 following corrections to the values from June 1912 to De- 

 cember 1938 are therefore suggested : 



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

 —12% —15% — 1»% —22% —23% —23% -24% -24% —20% -16% -12% -11% -17% 



