' EXTRACTS — FOREIGN AND DOMESTIC. 363 



Percent, of this 6,000. 



I Uxbridge do 55 



Aylesford do. 56 



Macclesfield do 44 



Westminster New Prison 57 



Milbank Penitentiary 80 



House of Correction, Clerkenwell 53 



Hanwell Lunatic Asylum 75 



nd if wc make the carbon in the food of some of our agricul- 

 i;l laborers the subject of comparison, we tind the deficiency 

 r,ter than in any of the above mentioned dietaries. 



could add to these many other experiments, which furnish, in 

 ropinion, irresistible evidence of the secretion of carbon by ani- 

 ls;. If an animal be kept without change of circumstances, or 

 f iet, except as to the quantity of food, it will be found that the 

 ^tjht of carbon in the air respired, does not vary in proportion 

 3 lat consumed in the shape of food. On the contrary, the de- 

 cacy of carbon supplied seems to be met by an extraordinary 

 (fit of the animal system, as appears from the following results 

 f pcurate observation : — 



la the food. In (be air respired, 



fi; animal in the first 24 hours ) 

 ]|S a plentiful supply of food, / 80 grs. of carbon 100 



ijere is ) 



n le next 24 hours a less quantity 70 

 " " a sparing do. 60 



" " a small do. 60 



" " a very small do 40 



m if the animal, instead of having its quantity of food variedj 

 held be sometimes left in a quiescent state, and sometimes excit- 

 (1 I great activity, the weight of carbon given off will be found 

 iry in proportion, within certain limits, to the activity of the 

 lals of the animal, and the exertion called forth- 



I the carbon in the food be represented by 100 



"jiat given off by an animal of easy habits will be 110 



'liat given off by an animal of active habits, will be. . . 130 



Ij). do. when under exertion ., 140 



1)). when under great exertion 150 



lithe animal be both stinted of food, and excited to great acti- 

 •tjthe (lifTerence between the carbon comprised in the food and 

 tairiyen off by the animal is as follows : 



I la the fooiL Ciiven ofll Difierenee. 



' Crbon 100 120 20 



' 80 105 25 



' 60 90 30 



) 



50 85 35 



