. ...... . i W. i 
ous Particles or Drops, by ftriking their fharp Spicula- 
into the more fine Particles of the Blood, break them, 
and give the confined condenfed Air Room to ex- 
pand itfelf, and c-aufe the fubfequent Ebullition an-d 
Inflation of tine Mufcle. 
xxxvrn. 
. But, becaufe an Objection might lie againft this 
Syftem, as, How it comes to pafs, that the Mufcle 
fhould fo fuddenly grow {lender, and reaffume its 
former State ; fince, according to our Author’s Do- 
<ftrine of Fermentation, it fhould feem, that, after 
the firft Ebullition, the Mufcle ought to remain con- 
ftantiy fwell’d, he proceeds to remove that* Qbftacle 
in his Jixth Section, by having recourfe to the fol- 
lowing Hypothecs : Let us fuppofe, fays he, befides 
the thick Air we breathe, another more fubtile Air j 
which, however ejHftic, can by no means be per- 
ceived, as being capable of penetrating freely all the 
Pores of the Body. He thinks this Suppoiition not 
at all abfurd, as believing that there is other Matter 
of different Degrees of Subtility, between this grofter 
Air of the Atmofphere and the Materia fubtilis > left 
there fhould be a Chafm in any Part of Nature ; and 
thinks it muft be elaftic, from the fame Caufc that 
that of the Atmofphere is 5 to wit, from the con- 
tinual Motion of the ethereal Matter , which always 
endeavours to drive: the lefs agitated and grofs Parti- 
cles from each other, and thereby obtain for itfelf a. 
free Paflage. 
XXXIX. 
