FUNDAMENTAL PRINCIPLES OF PLANT GROWTH. 27 



light at its disposal, climatic conditions and the condition of 

 tree growth. The amount of water transpired is so large in 

 comparison to the amount retained in the tree that while an 

 acre of forest may store in its trees 1000 pounds of carbon, 

 15 or 20 pounds of mineral substance and 5000 pounds of water 



Fig. 6.— Abnormal flower of strawberry with seven petals; not unusual. 



