113 



at the end of a week. On the same day elastin was placed on 

 several leaves of each of two plants in the propagating house. 

 No change was noted in three days. 



On September 3 nine leaves of a single plant in the propagat- 

 ing house were washed with distilled water, after which particles 

 of elastin which had been moistened with distilled water were 

 placed upon them. No movement of the tentacles was observed 

 during six days. On the same day particles of elastin which had 

 been moistened with dilute Liebig's meat extract were placed upon 

 two leaves of a plant in the propagating house. Observations 

 were made on three successive days, but no change was seen. 

 (Note the negative results with creatin recorded in the next sec- 

 tion of this paper.) 



On September 4 particles of elastin moistened with distilled 

 water were placed upon eleven leaves of a plant in the laboratory ; 

 three hours later a shght bending of the tentacles was noted. The 

 following morning all the tentacles had recovered, without effect 

 on the elastin. On the same day particles of dry elastin were 

 placed upon nine leaves of a single plant in the laboratory. After 

 three hours a slight bending of the tentacles nearest the elastin 

 was noted, but, after an interval of twenty hours, all the tentacles 

 had recovered. There was no effect on the elastin. 



On October 1 3 the experiment was repeated in the laboratory 

 with similar results. 



Elastin, then, is not digested by the leaves of these plants. 



Creatin 



Creatin particles were placed upon three leaves of one plant, 

 September 18, in the propagating house. They dissolved but 

 caused no bending of the tentacles. The drops of fluid were 

 present on the leaves for five days, but had disappeared entirely 

 by the ninth day. 



On September 23, the experiment was repeated upon one leaf 

 of each of four plants. The creatin dissolved within an hour 

 and a beadlike drop remained for three days on each tentacle 

 upon which the creatin had fallen. No bending of tentacles nor 

 other response occurred. 



