128 MEMOIR ON THE 



analogous to that analyfed by tEe ■ mafterly talents of 

 Fourcroy, I cannot determine ; as I had not a fufficient 

 quantity of it, to enable me to endeavour to imitate his 

 analyfis. From the black flaky fubftance being entirely 

 converted into the fatty matter (/), it is probable that 

 it refemblesj the fatty fubftance, defcribed by Dr. 

 Gibb 



.* 



(i) Shows the unCiuous fubftance to contain no 

 lime : 



(/) The black vomit yielded, on diftlllation, abrownifh 

 v^hite-coloured fluid, and a quantity of dark-coloured oily 

 matter. 



(»;) The carbonaceous matter (/) appeared to con- 

 tain muriatic acid in a combined ftate ; likewife lime and 

 iron : 



{/i) Proves, carbonic acid gas. f 



The proportion of the difterent fubftances which confti- 

 tute the black vomit, 1 had not an opportunity of efti- 

 mating, as 1 could not obtain a fufficieiit number of grains, 

 of the black flaky matter, to fubjetT: it to a more regular 

 analyfis. 



Experiments to afcertain the effc^s of black vomit on the 



living Jyjiem. 



From the internal furface of the ftomach and inteftinal 

 can<il appearing, on difl~e£lion, inflamed and fphacelated, 

 particularly in fome patients who had vomited black, it 

 has been believed that the black vomit was corrofive, and 



had 



* See Tranfaftions of the Royal Society of London, for 1794. 



■f When the foregoing experiments were committed to paper, and during 

 the period of the late yellow-fever, I fubmitted them to the perul'al of Dr. 

 Adam Seybert, Yfhofc chemical accuracy is well known to this Society. This 

 gentleman obligingly favored me with his company on the 2 2d of Novem- 

 ber, when mod cf the experiments were Ihown to him, made on the black 

 vomit, referved for that purpofe, and the refult nearly correfponded with 

 what has been akeady defcribed. 



