KPY ^^* four-digit number! m the column on ih« left give the totitude ond longitude of the 

 ^ ' loutheott corner of each one degree-quadrongle Each one-degree quadrangle ii divided 

 into 30'minutfc quadrangles, numbered ot in the diagram to the right The columns of these tables 

 give: A- minimum temperature, B-manimum temperoture, C - number of years, D - number of doys. 



DEPTH ZONE 



28 



