OV "RESPIRATION. 33^ 



pig did not appear uneasy, and the respired gas measured 

 550 in C: a portion of this was preserved for examination, 

 which we shall call No. 1. 



250 cubic inches more of the mixture were admitted into 

 B, and gradually passed, as before, during thirteen minutes ; 

 it measured 250 in C ; and a portion No. 2 was preserved 

 for examination. 



The animal did not seem to suffer any inconvenience. 

 250 cubic inches more of the mixture were admitted into B, 

 and gradually passed, as before, through A into C during 

 seventeen minutes. The animal now became quite sleepy, 

 but did not appear to suffer any thing. He was taken out 

 at the end of forty minutes. 



At the close of the experiment, the remains of the mix- Residue of the 

 ture, which had stood about an hour in the large water ga- "^'^^"^*^ ^^' 

 someter, being examined, were found to contain 22 per 

 cent of oxigen, and no carbonic acid; of the residual 78 

 parts, 20 were mixed with 10 of oxigen, Avhich had been 

 previously found to contain 3 per cent azote; these 30 parts 

 being detonated in Davy's improved Volta's eudiometer, by 

 the electric spark, were reduced to 3 parts; and these 3 

 parts, being treated with the tests for oxigen, were reduced 

 to 2 parts, a proof that all the hklrogen had been consumed; 

 but the 10 parts of oxigen contained 3 of azote; these de- 

 ducted from 20 leave 1.7 for the azote contained in 20 parts , 

 of the residuum 78. 



20: 1.7:: 78: 6-6 



The mixture employed, therefore, contained ia every 100 

 parts 



22 oxigea 



(j'6 azote 

 71-4 hidrogcn 



100 

 We next examined the gas which had been respired. 

 No. 1. 250 cubic inches respired during fifteen minutes. Ga? 1. ♦^x- 

 100 parts subjected to the action of lime water in Pepys' ^"^"^'^ 

 eudiometer, were reduced to 93-5 ; and these by the tests 

 for oxigen were farther diminished to 77. 20 ])arts of this 

 fr being mixe<l with 10 of oxigen and detonated, the resi- 

 Z 2 duum. 



