HOW TR1 



H 



THE LIBRARY 

 UNIVERSITY OF CALIFORNIA 



Santa Barbara 



THIS BOOK IS DUE ON THE LAST DATE 

 STAMPED BELOW. 





leaves is ve 

 large oak is 

 day during 

 ration of w 

 fully as imj 

 ocean, if nc 

 alone could 

 *,o sustain v 

 The roots 

 oxygen fron 

 active in po 

 smothered b 

 or hardenin 

 says the Ct 

 may be dro 

 water soake 

 The tip er 

 moisture fr 

 zero weathe 

 ter from th< 

 tarded unti 

 The largest 

 the soil an 

 slender roo 

 large roots 

 tree's food 

 ground. 



Trees eal 

 , leaves and 



breathe all the time, day and night, 

 , rain or shine, as steadily as we do, 

 ] they feed only part of the time. They 

 ' sleep in the night, during rainy 

 weather and throughout the winter. 

 The growing season is very short, 

 ending by midsummer. The summer 

 droughts cut off or diminish the sup- 

 ply of water. The leaves are battered 

 .and eaten ,by.insSPtS* 



DO 1 



Series 9482 



ed. This ministry, by the leaves, is 

 what lengthens the branches and roots 

 and adds to the trees diameter. The 

 upward mounting of the sap remains 

 one of the unexplored mysteries of 

 plant life. If a tree is girded it usu- 

 ally dies because the descending sap 

 cannot reach the roots, which soon 

 sent them by the leaves. _ ,^, 



