AND ANIMAL LIFE. 435 



the system, the superficial vessels and the extre- 

 mities receive an additional quantity, on account of 

 (he impetus with which it is propelled ; and the pulse 

 is also strong and full from the same cause, conjoined 

 with the better oxygenated state of the blood. These 

 views have been elucidated at length in various 

 parts of this work, and, therefore, do not require 

 a particular consideration on the present occa- 

 sion. As a further support to these principles, 

 I may mention the increase of the temperature 

 of the body after vomiting. The diffused glow 

 which is felt, and the profuse or gentle per- 

 spiration, cannot correctly be attributed to any 

 other causes than those which belong to sangui- 

 neous sympathy, viz. increase of temper at ure> and 

 a more equable distribution of the blood. 



DXXXIII. Having thus detailed, and attempt- 

 ed to explain the different kinds of phenomena 

 which originate from the two effects of emetics, 

 it may probably, to some, appear quite evident, 

 that, as the one excites, and the other depresses, 

 or, in other words, as the former equalizes and 

 stimulates the circulation, and the latter enfeebles 

 the force of this system, there is little difficulty 

 in applying this knowledge to practice. But 

 medicine is a science that demands deep thought 

 and circumspection ; the principles by which we 

 are guided are necessarily complex, and too fre- 

 quently fallacious. And, as we have to/ act on 

 animated matter, we must pause and consider 



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