Each rardcal interspace rerptesents one degtsa Fahrenfaeit, and the fiacfibnal' parts of a degree are indicated as exactly as possible in die plotting of tTie curtes- Each, fifth 

 dsgree Is represented by asliglifly Iteavjter lloa Xlie transverse interspaces iactosed by tiie liea.vier lines Yepresenl periods of ten days eadj^ as indicated by th.Q dates, on ' die 

 leftthanii side of the plate. The lighter, traasyersa lines; intermediate bOLween' flie heajder ones, are intended to represent the mean of eachten days, and the coffyes of tem|ker' 

 ataiB are plotted widi refereaiOE Co fliese ILiea The lefi-Jand AreriLcal distaoti b devoted b Qiq air teraperaturea Cor" iSSi, jtSSa and iKS^, thei middle disisLaa to to ssH^Bfl 

 ■ yafCT temperatures Cor thBsame'yeaiSt flmrpcnalt&g of a cnrnpansaaaf the two: aod tiie iigh£^iaad division Co thfTwaXer Cemp££StaEESt&f iSS^ and ££85, 



