19 



EXPERIMENT I. 



I passed a ligature around the head and tail of a 

 worm — weighed it, and put it into water ; after re- 

 maining in it twenty-four hours, it had increased in 

 weight twenty grains. The animal received no in- 

 jury from the experiment. 



EXPERIMENT II. 



I filled a phial with water two-thirds full, which 

 had been previously boiled ; introduced into it two 

 worms, and corked it perfectly tight, so as to cut off 

 the communication of the external air. The animals 

 lived thirty-six hours, 



EXPERIMENT III, 



At the same time, I filled a phial with water, two- 

 thirds full, which had not been boiled, and introduced 

 into it two worms ; the phial was left open so that 

 there might be a free access of air. They were per- 

 mitted to remain in this situation one week ; at the 

 expiration of which time they were active, and appeared 

 to enjoy good health. 



EXPERIMENT IV. 



I introduced a number of worms into sweet oil ; in 

 which they died in a few hours. It may be said, that it 

 was the deleterious effects of the oil that proved de- 



