Kpw The four-digif numbe" in the column on the left give the lotKude ond longitude ol the 

 ^ ' southeoit corner of eoch one degree-quodrongle. Each one-degree quadrangle is divided 

 into 30-minuie quodronglet, numbered as in the diogrom to the right The columns o( these tables 

 give: A ■ minimum temperature, B- mo«imum lemperoture. C - number o( yeori, D - number o< doyi. 



DEPTH ZONE 



32 



