54 



EXPERIMENT STATION. 



[Jan. 



ducing foliage several days earlier than j)lants 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 Ga^. 



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



Experiment. 



First 



Appearance 



of Leaves 



and Shoots. 



Gain in 

 Develop- 

 ment 

 (Days). 



Water charged 

 with Gas for a 

 Brief Period. 



f Normal, . 

 1 

 I Treated, . 



(Normal, . 

 Treated, . 

 (Normal, . 

 Treated, . 

 f Normal, . 

 [Treated, . 

 [ Normal, . 



I Treated, . 



SI 



Treated, . 



Treated, . 



f Normal, . 



[Treated, . 



(Normal, . 

 Treated, . 

 [ Normal, . 

 8 j Treated, . 

 [Treated, . 

 f Normal, . 



[ Treated, 



August 19 

 August 10 

 December 10 

 December 2 

 January 4 

 December 27 

 December 29 

 December 23 

 February 4 

 January 24 

 January 22 

 January 24 

 February 20 

 February 15 

 March 25 

 March 

 April 

 April 

 April 

 July 

 July 



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 



