226 "The Wisdom of GOD Part II. 



Hole of the Diaphragm^ for otherwife the Liver 

 and Stomach being fo weighty, they would draw 

 it down too much towards the Abdomen^ fo that 

 upon the Relaxation of its Fibres in its Diajlole 

 it would not afcend fufficiently into the 'Thorax, 

 fo as to caufe a Subfidency of the Lungs, by lef- 

 fening the Cavity there. In ^ladrupeds there is 

 no need of this Adhefion of the Pericardium to 

 the Diaphragviy for in them in Expi-ratio?i, when 

 the Fibres of the Diaphragm are relax'd , the 

 weight of the Vifcera of the Abdomen will eafily 

 prefs the Diaphragm up into the Cavity of the 

 Thorax , and fo perform that Service ; befides, 

 were the Pericardium faften'd to the Diaphragm 

 in ^ladriipeds^ it would hinder its Syftole in /;?- 

 fpiration, or its Defcent downwards upon the 

 Contradtion of its mufcular Fibres, and the more, 

 becaufe the Diaphragm being thus ty'd up, it 

 could not then fo freely force down the weight 

 of the Vifcera, which are always preffing upon it, 

 and confequently not fufficiently dilate the Cavi- 

 ty of the Thorax, and therefore muft hinder their 

 Infpiration. Thus we fee how neceffary it is that 

 in Ma?i the Pericardiu?n fhould be faften'd to. the 

 Diaphragm, and in ^ladrupeds how inconvenient 

 it would be. And Jince %ve find this difference be- 

 tween the Hearts of Brutes and Men in this Parti- 

 cular, how can we- imagiiie but that it miifi needs 

 be the Effect of Wifdom and Defign, and that Man 

 was intended by N atiire to walk creel, and not upon 

 all four, as ^adrupcds do ? 



IL The 



