KC Y T^* four -digit numbers in the column on the left give iKe latitude ond longitude of the 

 ^ ■ ioutheoit corner of eoch one degree - quadrangle . Each one-degree quadrangle is divided 

 into 30-minute quodronglei, numbered as m the diagram lo (he right The columns of these tables 

 give^ A - minimum temperature, B- maximum temperature, C - number of years, D - number of doys. 



DEPTH ZONE 



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