aoo 



ON Rl&:SPIRATroJ{» 



Jbs, oz. 



6 2 water displaceci by the lungs 

 4 1 weight 01 the lungs 



2 1, or 59*554 cub. in. of air in the lunj^s, to -which mu«i 

 he added SrSBO the volume of the air forced into the blad- 

 der on opening the thorax. 



9M34 



and this gives us 91*134 cubic inches, as the air contained 

 in the lungs of this person after death ; and when we reflect, 

 that the air must have been under compression, when the 

 lungs were immersed in water, some force being required to 

 keep them do\vn, and also that not less than 7 or 8 cubic 

 inches must he contained in the fauces &c., we cannot esti- 

 mate the whole at less than 100 cubic inches. 



It is farther to be noted, that these 1 00 cubic inches would 

 ©ccupy much more space in the temperature of the human 

 body, than in the mean tevuperature in which the examina- 

 tion was made; and this difference would be nearly 8 cubic 

 inches; the air left in the lungs, after complete expiration* 



ftjund'tobetOfi would therefore be 108 cubic inches; but the mean of out 



cub. iiorhes. experiments would make it 183,, 



Experiment l. 



141 



2« 



2-25 



3. 



236 



4. 



133 



4)735 



183 



FitTogcn We are then almost compelled to allow, that, when pure 



^^h^'iT'* t""' oxigen is respired, a portion of azote is given off from the 



blood. 

 Experiment on We now resojved to perform a series of experiments upon 

 a guineapig. gome animal, which lived wholly upon vegetable food, and 



made choice of the Guinea pig as one of the most manageable. 

 Appnratus de- T^^ apparatus consisted of two large mercurial gaso- 

 scribed.. meters,, which were made to communicate with a strong 



trough 



