CHArTi-:R III 



TRKK STKMS 



WALK tlii'oui^h a wdocI on a bright 

 fla)' in February w ill afford us man\- 

 interestinf^ intuitions about the i^rowth 

 trees. 



We are apt to think of winter as a 

 (lead season, and lonL:^ for summer da}'s once 

 more, that we ma}- pursue our bcjtanical studies ; 

 but as soon as l-'ebruary beL;ins there is alread\' a 

 secret work s^oin<^ on within the tree-stems, the sap 

 is ri.sin<T from the roots, and this ascent is easily to 

 be traced if we look carefully at the trunks of those 

 trees, such as the oak, elm, and others, w hich have 

 ruf^ged bark. The wood within is swellinej ; fresh 

 la\-ers of material will, a little later on, be added to 

 the inner side of the bark as a result of this ascent 

 of the sajx 



