WHOLE VOL. NOTES. INDIAN OCEAN 37 



MAN ADO (MEN ADO) 



Authority. 



Koninklijk Magnetisch en ]\leteorologisch Observatorium te 

 Batavia, Centrum. Precipitation only. 



MANOKWARI 



Authority. 



Koninklijk Magnetisch en Meteorologisch Observatorium te 

 Batavia, Centrum. Precipitation only. 



MEDAN 



Authority. 



Koninklijk Magnetisch en Meteorologisch Observatorium te 

 Batavia, Centrum, and Climatological Tables, vol. 19 A, of 

 the same observatory. 



Site. 



The observations of the years 1939 and 1940 are made at the 

 aerodrome of Medan. Position of the aerodrome is Lat. 

 3° 36' N., Long. 98° 41' E. ; height above sea level, 26 m. 



Temperature. 



In those cases in which a station was already in operation before 

 1933, the total averages of the monthly and yearly means of 

 temperature have been closed at the end of 1932, whereas the 

 tables are reopened at the start of 1933 and closed again at 

 the end of 1938. The reason is that during the years before 

 1933 temperatures were read from records at every 2-hour 

 interval. The monthly and annual means are therefore true 

 daily means. 

 From 1933 onward temperature was noted at 6'^, 14*^, and 20^^ 

 only, the mean of these values being taken as daily means. 

 Consequently, the tables of monthly and annual means of 

 temperature before 1933 and from 1933 onward are not 

 homogeneous. 



PADANG 



Authority. 



Koninklijk Magnetisch en Meteorologisch Observatorium te 

 Batavia, Centrum. Precipitation only. 



