I^PY ^^* (ourdigit nwmbeFi m the column on lh» Ufl giv« th« lotilodfl ond longitude of the 

 '^ ^ ' southeast corner of eoch one degree-quodrar>gle. Eoch one-degree quodrongle ii dtvided 

 into 30-minule quodrortgtet, numbered os in the diagram to the right. The columns of th«se tobies 

 givei A ■ minimum temperature. B ■ moKimum lemperolure, C ■ number of years, D - number of doys. 



DEPTH ZONE 



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