MifteUanea Curio fa. 381 



very way, in Proportion to their Preflures, the 

 Parts of the Air pufh againft all the fides of the 

 VeficuU) and promote the Paflage of the Blood. 



We have a convincing Inftance of all this, in 

 thofe who go to the top of high Mountains, for 

 the Air is there fo pure (as they call it) that is, 

 wants fb much of its Gravity and Elafticity, that 

 they Breaih with very great difficulty. 



3 . All the Fluids in Animals have in them a 

 mixture of Elaftic Aura, which when fet at li- 

 berty, (hews its Energy, and caufes thofe Fermen- 

 tations we obferve in the Blood and Spirits : 

 Now when the Preffure of the Atmofphere, up- 

 on the Surface of our Body is diminiftied, the ' 

 inward Air in the Veffels muft neceflarity be in- 

 abled to exert its Force, in Proportion to the 

 leffening the Gravity and Elafticity of the out- 

 ward j hereupon the Juices begin to ferment, 

 change the Union and Cohxfion of their Parts, 

 break their Canals, &c. 



This is very plain in Jiving Creatures put into 

 the Receiver, exhaufted by the Air-Pump, which 

 always fwell as the Air is more and more drawn 

 out j their Lungs at the fame time contracting 

 themfelves,and falling fb together as to be hardly 

 difcernible. (*) 



E're we proceed to Matters of Fact, it may 

 be worth the while to take Notice, That Efle£b 

 depending on fuch Caufes as thefe, muft of ne- 

 cefTity be moft vifible in Weak Bodies and Mor- 

 bid Conftirutions, when other Circumftances con- 

 cur to their taking Place. For this reafbn, what* 

 ever Mifchicfs do hence follow, cannot in the 



leaft 



(a) Efpericntf kWAukmn del Cimtnxo % p.m. 113. 



