54 



EXPERIMENT STATION. 



[Jan. 



ducing foliage several clajs earlier than plants grown in water 

 not charged with gas. 



The results of experiments with latent willow cuttings grown 

 under these conditions are shown in Table I. The cuttings 

 were grown in glass jars containing about 2 litres of water 

 which was charged at different periods, as shown in the follow- 



ing table; 



Table I. — Showing Stimulating Effects of Illuminating Gas on Willow 

 Cuttings grown in Water charged with Gas. 



[In all experiments except No. 1, 8 normal and 8 treated cuttings wore used in each series.] 



Experiment. 



rir.st 

 Appearance 



of Leaves 

 and Shoots. 



Gain in 

 Develop- 

 ment 

 (Days). 



Water charged 

 witli Gas for a 

 Brief Period. 



5< 



(Normal, 

 Treated, , 

 {Normal, 

 Treated, 

 f Normal, 

 [ Treated, 



f Normal, 

 i\ 



[.Treated, 



Normal, . 

 Treated, , 

 Treated, , 

 Treated, 



(Normal, 

 Treated, 

 (Normal, 

 Treated, 

 Normal, 

 Treated, 

 , Treated, 



{Normal, 

 Treated, 



Every second day. 

 Every second day. 

 Every second day. 

 E.very second day. 



Every second day. 



Every fourth day. 

 Every sixth day. 



Every second day. 



Every seventh day. 



Every second day. 

 Every fourth day. 

 Every second day. 



The data given in this table show that the willow cuttings 

 contained in the charged jars developed new shoots and foliage 

 from four to eleven days earlier than those grown in jars con- 

 taining the ordinary uncharged tapwater. They also show that 



