NOTES AND EXPLANATIONS 



Tliroiighout llie notes and tables, the following abbreviations have been nsed : 

 ft. = foot, feet. 



" =: hour of observation, as 8", 14''. 

 H := height of ground above Mean .Sea Level. 

 Hb= height of barometer above sea level, 

 hr := height of rain gage above ground, 

 ht := height of thermometer above ground, 

 in. = inch, inches. 

 Lat. := latitude. 

 Long. = longitude. 

 "" = minute, 

 m. = meter, 

 mm. = millimeter. 



AFRICA 



ABBASSTA, EGYPT 



Authority. 



Phy.sical Department. Ministry of I'liblic VVork.s, Cairo, Egypt. 

 Pressure. 



Site: The height of the 1)arometer above Mean Sea Eevel was : 



1869 to 1903 33 m. 



1904 to 1922 29.9 m. 



All vahies have been reduced to a height of 33 m. 

 Instruments: The following barometers were in use: 

 1869 to 1899. Fastre Fortin i. Index error cor- 

 rection applied +o.t mm. 



1900 January to April. Fuess Syphon 430. In- 

 dex error correction applied 0.0 mm. 



1900 May to September. Fastre Fortin 2. In- 

 dex error correction applied + 1.0 mm. 



1900 October to 1903. Fuess Syphon 4GF. In- 

 dex error correction applied +0.3 mm. 



1904 to 1905 February. All readings rejected. 



1905 March to 1912 May. Hicks Fortin 1325. 



Index error correction appliefl +0. lO mm. 



1912 June and July. Fuess Portable 1646. Index 



error correction applied —0.25 mm. 



I 



