iltljB M. Flqurens on the effects of 



thargy itself, for the state of rest in the animal economy always 

 corresponds to the state of the circulation. 



Respiration was then successively suspended in different 

 lerots more and more profoundly lethargic, and the following 

 were the results. In all of them the circulation survives the 

 respiration ; — in all, the time was as much longer as the le- 

 thargy was profound, and the external temperature nearer the 

 temperature proper to the lethargic state. I at last succeeded 

 by a suspension of respiration, successively interrupted and re- 

 sumed, to render the animal lethargic under degrees of cold less 

 than those which it would have required to become so with a 

 free respiration. 



Every thing then proves that it is by respiration and by 

 means of the modifications which it impresses on this function, 

 that cold acts in lethargy. 



I now pass to another class of experiments, and to the cu- 

 rious results which were obtained, and hasten to add some con- 

 clusions of more immediate utility. 



In May 1826, when I was in the country, there was brought 

 to me a young duck of a brood newly hatched, which was on 

 thie point of being suffocated. It opened its mouth wide, 

 breathed with extreme difficulty, and died at the, er/d of an 

 hojur or two. 



•jvThe examination qf its organs exhibited the lungs of a de,ep 

 red and gorged with blood. The animal had died of a violent 

 inflammation of the lungs. 



. I riepaired to the spot where the ducks were, and I was soon 

 shown a second, which was about to sink under suffocation like 

 the first, and while I was examining it, a third was suddenly 

 seized before my eyes, with an oppression of the breath so vio- 

 lent, that at the moment it was attacked the animal became 

 piotionless, openpd itp mouth wide, breathed with extreme dif- 

 ficpUyy neither at? por drank, and died aj; tl^e end of two or 

 thx^e hours. 



3: The one which I had found suffocating on my arrival also 

 died spme hours after the attack- Both of them exhibited the 

 same inflammatory fullness of the lungs which I had observed 

 ii>, the first. It was under the same kind of acute pneumony 

 that both of them had died, and it was besides evident, upon 



