6 1 8 On the Effe^s of Terra Fonder oja. 



but before I received it, which was a couple of 

 days, it had attra6ted fo much fixed air from 

 the Atmofphere as to be become perfectly mild, 

 and it required a ftrong heat to render it again 

 cauftic. 



Exp. VI. One drachm of this given to a Dog 

 weighing about fixteen pounds, brought on a 

 vomiting and purging in about a couple of hours, 

 after which he was a little fick, but foon re- 

 covered and has been well ever fince. 



By thefe experiments. Dr. Leigh's Account of 

 the general faft of the pernicious efFefts of 

 Aerated Barytes is fufficiently proved ; and it 

 appears, that the Muriated and Nitrated Barytes 

 may be given, to dogs, without any permanent 

 injury, in much greater quantities than has been 

 fuppofed. It alfo appears, that the Cauftic Earth 

 does not, by any means, produce fuch noxious 

 efFefts as the Aerated; owing, perhaps, to the 

 great quantity of fixed air which becomes dif- 

 engaged, when the latter is diffolved in the 

 Stomach by the gaftric acid. How far the in- 

 ference, from inferior animals, will hold with 

 regard to mankind, muft be left to better Phy- 

 fiologifts to determine. 



AN 



