In order to obtain a yearly mean where some of the monthly 

 means were not determined because of insufficient observations, 

 values have been interpolated or inferred and enclosed within paren- 

 theses . 



The mean and extreme temperatures are given in degrees and 



tenths of the centigrade scale. If it is desired to change them 



to the corresponding Fahrenheit scale, this may be done by use of 

 the following formula: 



Temp, m degrees F. = Temp, in degrees C. x 1.8 + 32° 



For convenience a Centigrade-Fahrenheit conversion tahle is 

 given on the back cover page. 



