l/pY The foor-digit numbers <n the column on the left give the latitude ond longitude of the 

 •* ^ ' ioulheast corner of eoch one degree -quodrongle Eoch one-degree quadrangle is divided 

 into 30-ininute quadrongles, numbered as m the diagram to the right The columns of these tables 

 give: A- minimum temperature, B- maximum temperature, C- number of /ears, D- number of doys. 



DEPTH ZONE 



52 



