ATMOSPHERE. [Lesson xvi. 



addition. When it passes to the veins, its capacity 

 for caloric is diminished, as much as it had been 

 before increased in the longs: the caloric, there- 

 fore, which had been absorbed, is again given out fc 

 and this slow and constant evolution of caloric in 

 the extreme vessels over the whole body, is the 

 source of that uniform temperature which we have 

 so much occasion to admire. Dr. Crawford asr 

 certained, that whenever an animal is placed in a 

 medium, the temperature of which is considerably 

 high, the usual change of arterial into venous 

 blood does not go on j consequently, no evolution 

 of caloric will take place, and the animal heat 

 will not rise much above the natural standard. 

 How pleasing it is to contemplate the arrange- 

 ments which the Deity has made for the preservat- 

 ion and felichy of his creatures, and to observe 

 .that he has provided for every possible exigency ! 



Lavoisier has shewn, that in respiration there is 

 a constant combination of the oxygen of the at- 

 mbsphere with the hydrogen and carbon of the 

 blood. 



Thus Itfe discordant elements arrests, 



Rejects the noxious and tire pure digests ; 



Combines with heat the fluctuating mass, 



And gives a while solidity to gas, DARTHH.. 



A postulatutn has been assumed by some atheists, 

 that the organs of the body have been formed by 

 what they call appetency, i. e. endeavours per- 

 petuated, and imperceptibly working its effects 

 through a long series of generations : hut I. would 



ask-, 



