ON THE GASEOVS OXIDE OF AZOTE. Qj^ 



welted and boiled for a fhort time without yielding any gas; 



at ienglh, the retort became filled with a while vapour, wtiich 



quickly difappeared ; the gas was then rapidly difengaged, 



and was caught in bladders. By degrees the difengagement 



became more and more flow, and when the operation was 



ended, fcarcely any thing remained in the retort. 



Another experiment was made with a larger retort, and "^^^ ^^'"^ P™" 

 • , ^ , , ,• ■ r , r t • . cefs on a larger 



three hectogrammes (10 oz. troy) ot the lalt, from which was fcaie, 



obtained gas fufficient to fill eight bladders. This operation 



proceeded in a fimilar manner with the former; except that 



as the retort cooled, a red vapour arof* within it, which it was 



afcertained by experiment, contained no nitrous gas. 



EffeSts of Gafeous Oxide of Azote xvhen breathed into the Lungs. 



All who have tafted or inhaled this gas, agree in defcribing The gas has a 

 its flavour as ftrongly faccharine, and remaining upon the or- *" *""* ^^ ^* 

 gans of fome perfons during the whole day after receiving it. 

 M. Difpan obferved in it an afler-tafteof nitre; but acknow- 

 ledges that it was the laft colle6led gas which he tafted. — 

 M. de M * * *, perhaps under a fimilar impreffion, fays he 

 perceived in it a ftyptic quality. 



The method of refpiring this gas was by means of a biad- The gas was tt- 

 der with a fiop-cock in It, applied to the mouth; the noftrils P'" * 

 being clofed, and (he lungs as much as poflible emptied. 



No. 1. The firft perfon upon whom the experiment was 

 jjried, fwooned at the third infpiration, and remained fenfelefs 

 about five minutes, when he recovered, but with a fenfation 

 of great fatigue. He recollefled to have experienced only a 

 fudden faintnefs, attended with a tingling at the temples. 



No. 2. AI. de M * * * obferved a faccharine and flyptic 

 tafl:e, and experienced a fenfe of great dilatation, accompanied 

 with heat in the breaft ; his veins fwelled, and his pulfe was 

 quickened : furrounding objeAs feemed to revolve round him. 

 But he thought he could have borne a ftronger dofe; the blad- 

 der not being large enough for his lungs. 



No. 3 experienced a faccharine tafie on the firft infpiration ; 

 but became Infenfible to thofe which fucceeded. His lungi; 

 were forcibly dilated with great heat. When the bladder was 

 removed, he appeared very comfortable, but could not refrain 

 from violent burfts of involuntary laughter. 



No. 



