On the Effe^s of Terra Ponderofa. 615 



already been exhibited, and with this view infti- 

 tuted the following experinnents. 



Exp. III. I gave a Dog weighing twenty 

 pounds, thirty grains of cryftallized Muriated 

 Barytes, with bacon. He appeared very uneafy 

 immediately after taking it, and, though before 

 extremely hungry, refufed meat. In about twenty 

 minutes, he began to froth at the mouth, and 

 in ten more he vomited a little, after which he 

 drank freely of water; he was purged and re- 

 mained extremely fick and uneafy till about an 

 hour after he had taken it, when he threw up the 

 whole, but did not get the better of his ficknefs 

 and uneafinefs, for near twelve hours afterwards. 



Exp. IV. After an intermilllon of a week, I 

 gave the fame dog one drachm of the cryftallized 

 Muriated Barytes as above; he grew fick in a 

 quarter of an hour and threw up the whole in 

 twenty minutes, after which he was violently 

 purged. He continued ill for about four hours, 

 when he again recovered his appetite and the 

 next day was perfectly well. 



Exp. V. I adminiftered fifteeen grains of the 

 cryftallized Nitrated Barytes to a Puppy weighing 

 nine pounds. It did not bring on any ficknefs till 

 about forty minutes after he had taken ir, and he 

 retained his appetite till then. In five minutes 

 more it afted emetically and cathartically, after 

 which he gradually recovered his vivacity, and 

 •was well in an hour's time. 



R r 4 Exp. 



