84 Mr Darwin and Miss Pertz, On the effect of [Feb. 10, 



Experiment 6: 10th October, 1895. 

 Elodea. Fresh Tap-water. 



Experiment 7 : 12th October, 1895. 

 Elodea. Fresh Tap-water. 



1 rate means rate of bubbling. 



2 quantity means amount of gas collected, expressed in eudiometer-graduations 

 per minute. 



