key: 



■ nio 30- 

 g.ve: A 



rhe (oof-digit numbefs m the column on the left gi«e the latitude ond longitude of the 

 toulheosl corner of eoch one degree -quodrongle Eoch one-degree quadror>gle it divided 

 Ufiute quadror>glei, numbered as in the diogfom to the right The columnt of these tobies 

 minimum tempera lure. B- mo«imum temperature, C- number of yean, D- number of days. 



DEPTH ZONE 



48 



