Kpw Th» four -digit numbfl't m the column on the l«ft give the latitude and longitude of the 

 ^ ' southeoil corner of each one degree-quodrangle. Each one-degree quadrangle ii divided 

 into 30-minute quodranglet, numbered as in the diagram to the right. The columni of these tobies 

 give I A- minimum temperoture, B- mo«imum temperature, C ■ number of yeors, D - number o( doys. 



DEPTH ZONE 



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