!• P Y The 1our-d>git nymbe'* m ihe column on the left give the laittyde ond longitude of 'he 

 "^ ■• ' ioutheait corner of each one degree-quadrangle Each one-degree quadrangle it divided 

 into 30-mini;te quodrongles, numbered oj in the diagram to the right The columnj o( these tables 

 giwe: A - minimum temperature, B- maatmum temperature, C ■ number of years, • number of days 



DEPTH ZONE 



44 



