32 THE LAWS O ORGANIC 



demand attention. The frequent cries of the 

 infant are made at the expence of expiratory 

 actions, and the continuance of these renders the 

 blood stimulating, the circulation more equable 

 and quick than at any other period ; and these 

 principles being established, every organ of the 

 system soon participates in the primary improve- 

 ment, and the reciprocal influence is generally 

 diffused and felt throughout the system. 



XXXVIII. In infants whose constitutions 

 are strong, we sometimes observe the facility 

 with which they are nursed ; and these being 

 well formed, and of sound health, do not require 

 the operation of extraordinary means : but those 

 in an opposite state, from their great necessities, 

 are continually excited by causes calculated to 

 lessen or remove the sources of irritation. It is 

 no objection to this view to advance, that many 

 diseases are to be traced to these actions which 

 I regard as salutary. The heart is sometimes 

 subject to aneurism, from having been too much 

 excited, either by external or internal causes, 

 by means of which too much blood, or blood of 

 too highly oxygenated properties, is determined 

 to this organ ; but these consequences are no ob- 

 jections to its utility. 



XXXIX. If the nature of this chapter would 

 allow me to pursue the train of the present ar- 

 gument through the variety of its relations, it 

 would not be difficult to point out or explain 



