270 



Transactions of the Canadian Institute. 



[Vol. VII. 



continue for any extended length of time. If liquid food be supplied to 

 the leaves and a distinct growth results — that is, a growth more 



FIG. 7. 

 H, reservoir for nutrient solution ; R, regulating tap ; A, tube through which water and air are 

 supplied to the roots ; B, ventilator ; P, sheet rubber ; M, wax ; E, exit tube ; D, distilled water ; S, 

 spray : F, receiver. 



pronounced than that in the case of water alone — it is deemed 

 reasonable to conclude that some of the food solution was absorbed to 



