KEY 



1 (our -digit nomberi in the column on the left give the latitude and longitude of the 

 southeost corner of eoch one degree -quodrongle Each one-degree quodrongle is divided 

 into 30-minuie quadrangles, numbered as m the diagram to the right. The columns of these tables 

 givei A- minimum temperature, B-mo«imum temperature, C ■ number of years, D - number of days. 



DEPTH ZONE 



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