!• P Y The fogr -d-git numbe'* lO the column on (he left give fhe latitude and longitude of the 

 •^ ^ ' ioutheojl corner of each one degree - quodrangle Eoth one-degree quadrangle it divided 

 into 30-minuie quodronglei, numbered oi in the diagram lo the nghl. The columns of tK«ie toblei 

 give: A- minnnum temperature, B- ma«imum temperature, C ■ number of yeort, D • number of doyi. 



49 



