THE BLOOD. 29 



As the blood is coagulable by heat, and as the heat of an 

 animal is increased in fevers, it has been supposed that the 

 blood might be coagulated by the animal heat, even whilst it 

 is circulating in the vessels ; but there is little foundation for 

 such an opinion ; since the animal heat is naturally only 98 

 or 100, and in the most ardent fever is not raised above 112. 

 (xvn*). 



Serum, sp. gr. 1029, frombuffy blood, tried at the same time for com- 

 parison, coagulated at 160 ; was semi-transparent at 1/0, but forming 

 a much firmer clot than the serum of the hydrocele at a higher tem- 

 perature. The serum from the blood was quite opake at 212. 

 (xvn*) See Note xvi. 



