ANIMAL HEAT. 109 



injection of the infusion of tobacco into the intes- 

 tine, keeping not only the extremities but the 

 whole body of the animal in a state of constant 

 motion, and lasting for some minutes after the 

 artificial respiration had been discontinued and 

 the blood had ceased to circulate. 



It was with a view to obtain more exact in- 

 formation as to the quantity of oxygen consumed 

 under these circumstances, that my second series 

 of experiments was instituted. The apparatus 

 employed in the investigation proved to be well 

 adapted for the intended purpose ; the experi- 

 ments were carefully made ; and the air, after 

 they were concluded, having been always exa- 

 mined by my friend Professor Brande, there can 

 be no doubt as to the accuracy with which the 

 proportion of carbonic acid in it was ascertained. 



These last-mentioned experiments were re- 

 peated, in the year following that in which an 

 account of them was published in the Philoso- 

 phical Transactions, by M. Le Gallois ; with some 

 considerable modifications, however, which I shall 

 notice hereafter. In his third memoir on animal 

 heat, this philosopher, after having described his 

 own want of success in contriving an apparatus 

 for the purpose of measuring the quantity of 

 oxygen consumed by animals breathing by arti- 

 ficial means, observes : " M. Brodie a trouve 

 le moyen de pratiquer I'insufflation pulmonaire 

 dans des vaisseaux fermes a une maniere a la fois 

 sure et commode. L'appareil qu'il a imagine 

 pour cela est fort simple, et reunit toutes les 



