AND ANIMAL LIFE. 21 



relief which it gives to the internal organs, by diffus- 

 ing more generally and equably the circulation of 

 blood. 



5. The buffy or inflammatory coat of blood, in diseases 



and exercise, will be proportionate cceteris parib:is to 

 the quantity and force of blood circulating through 

 the lungs, as its changes bear a ratio to those condi- 

 tions. 



6. The absence, or partial existence of this symptom, in 



typhoid or nervous affections, will be regulated by the 

 quantity and force of blood circulating in the lungs ; 

 but these states will be most obvious when the quan- 

 tity is the greatest, and the force the least. 



7. Every exertion characterised by muscular and expir- 



atory action will increase the temperature of the body, 

 and tend to equalise the circulation. 



8. Every exertion characterised by muscular and inspira^ 



tory action will diminish the temperature of the body, 

 and tend to destroy the regular distribution of the 

 blood. 



9. The effects of respiration, on the animal economy, can 



be estimated only by ascertaining the character, fre- 

 quency, and force of the acts of which it is composed. 



XXIX. LEGALLOIS found, in his ingenious 

 experiments on rabbits, that, when they were 

 tied upon their back, or in any way constrained, 

 the temperature of the animal was diminished, 

 He afterwards endeavoured to discover whether 

 a smaller portion of oxygen was consumed dur- 

 ing this state, to account for the diminution. 

 Experiments instituted for this purpose require 



