[ J 7 3 
priety in imagining, that, when flefhy Fibres are fill’d 
or puffed up by Fermentation, they fhould be fubjeft to 
any kind of Corrugation ; it being rather an Effect 
of Emptinefs than Repletion in flexible Bodies. 
XXII. 
This Hypothefis, however ingenious in the Whole, 
does not feem very fatisfa&ory $ and indeed it was 
foon taken into Confederation by the famous Dr. 
Mayow , who rejc&s both this and the Opinion of 
Stem urging many Arguments againft the Sufficiency 
of either in accounting for mufcular Motion. Let us 
fee how far he excelled them on the fame Subject 
himfelf. 
XXIII. 
This ingenious Author * takes notice of 
two Sorts of Fibres ; viz. mufcular Fibres , 
and membranous Fibrillee: The former he deferibes 
with Steno ; being fatisfy’d with what that Author 
has faid about them, as to their Stru&ure : The 
latter, being the Fibrilla> he fays, are a wonderful 
Series of Fibres parallel to each other, and which 
interfedt the flcfhy Fibres in a tranfverfc Direction, yet 
fomewhat obliquely. This Obfervation he has made 
upon boil’d mufcular Flefh ; and fays alfo, That altho’ 
it had been the Opinion before him, that Contra&ion 
was performed by the mufcular or flefhy Fibres, yet 
it is his Opinion, that the FibrilU are principally 
con- 
* Tra&atus quinque Medico-Thyfci. 
cap. 2, 3,4, <6 c. 
D 
Vide De Motu Mufcular 
