6 14 On the Efe^s of Terra T?onderofa. 



of finely pounded Aerated Barytes ftrewed upon 

 bacon. During the firft half hour no vifible 

 efFedts were produced, but a few minutes after- 

 wards an incipient languor was diftinftly obfer- 

 vable, yet accompanied with a degree of reftlefs- 

 nefs and feeming anxiety, which continued till 

 about two o'clock, when he vomited the whole 

 of what had been given him, and was violently 

 purged. From that time till fix o'clock he ap- 

 peared extremely anxious and reftlefs, without 

 giving any fymptoms of acute pain and without 

 becoming at all paralytic. He was found dead 

 early the next morning. Upon opening the 

 carcafe, the Stomach was found replete and 

 diftended with a large quantity of Straw, which 

 the animal had probably eaten to relieve the 

 uneafinefs he felt. The other appearances were 

 quite natural, except that one lobe of the lungs was 

 a little inflamed, which might be adventitious. 



Mr. Thomas Henry, junior, repeated the firft 

 experiment and found fimilar effefts produced ; 

 the Stomach and the whole inteftinal canal were 

 much inflamed in his fubjefl; the inner coat of 

 the Stomach, particularly about the pylorus, was 

 of a deep livid colour. 



Thefe experiments having appeared fufficient 

 to prove the ftrong operation of the Aerated 

 Barytes on the Animal CEconomy, I was defirous 

 of knowing the relative efFeds produced by thofe 

 combinations of the Terra Ponderofa which had 



already 



