Ore Respiration. , 415 



hardness to an almost absolute infusibility : but the Etrus- 

 can vases will always be in request, in consequence of the 

 beauty, elegance, and regularity of their forms ; and every- 

 thing connected with the history and arts of the Romaa \ 

 people must be interesting to the progress of industry. 



LXII. On Respiration. !>?/ William Allen, £59., F.R.S. 

 and WiLHAxM Hasledine Pepys, Esq., F.R.S. 



[Concluded from p. S87.] 



Experiment IV. Oxygen Gas. 



J. HE pig hitherto employed was put into the glass vessel 

 A, which with the tube contained 60 cubic inches of at- 

 mospheric air; 230 cubic inches of oxygen, containing 

 5 per cent, of azote, were admitted into the gasometer 

 communicating with B, and during a quarter of an hour 

 were niadc to pass slowly through the vessel in which the 

 animal was confined, to the empty gasometer communicatino" 

 with C, where it measured exactly 250 cubic inches ; a 

 portion was preserved in the merciuiai bath for examina- 

 tion, and the gasometer B was replenished with 250 cubic 

 inches of the same oxygen , tliis was passed in about the 



same time as before, through A into gasometer C, when 



it measured 24 8 cubic inches. 



250 cubic inches more of the oxygen were now admitted 



into gasometer B, and passed in the same manner through 



A into C, where they measured 249. 



The gasometer B was for the fourth and last time sup- 

 plied with 250 cubic inches more of the oxygen, which were 



passed as before, through A into C, during about a quarter 



of an hour, and then measured 249. 



The pig had remained in the vessel one hour and twelve 



minutes ; it did not appear to have suffered in the least; 



portions of the respired gas were saved from each of the 



gasometers, and cxan)ined as usual. 



Cubic Inches. Contained in Carb. Acid. Oxygen. Azote. 

 100 parts. 



No. 1. 250 Carb. acid 8 20 



Oxygen 66 165 



Azote 26 65 



100 



No, 2. 



