336 



Plant Physiology 



whereas twice as much time would be required without 

 etherization. Later in the season the lilac is not so 

 readily forced, and there is no such marked contrast be- 

 tween the treated and the control plants. Material 



FIG. 88. Lilies of the valley, etherized (A) and unetherized (B), then 

 grown under similar conditions for the same length of time. 



capable of beginning growth immediately cannot be 

 forced in this way. 



There is some contradictory evidence respecting the 

 etherization of bulbs, but in general, the practice has been 

 successfully employed with lilies of the valley, narcissus 

 and daffodils, and certain lilies and tulips; but the best 



