[ 3 ° ] 
ce Fibre to be a String of Bladders or Veficles, into 
<6 which, he fuppofes, the Nerves, Veins, and Arte- 
<£ ties to open . 
Kcill. Ci That the Contradion, or Swelling of 
* e the Muficles, is performed by the Blood 
<£ and Animal Spirits diftending thefe Vehicles V 
but endeavours to prove, by many ingenious Argu- 
ments, that neither the Spirits alone, nor the Quan- 
tity of both together, diftend the Veficles; but that 
both mixing and rarefying * together, caufe them to 
fwell: For, ££ That the Globules of Blood continu- 
<( nually circulating through thefe Veficles of the 
6£ Fibres, which are, probably, capable of containing 
t£ only one Globule at a time, in which Globule (he 
t£ fuppofes a Globule of Air) meet with the Animal 
<£ Spirits which drop from the Nerves: That the 
<£ Spirits furrounding the Globule of Blood muft at- 
ec trad the Particles of it, of which they are com- 
5£ pofed, more ftrongly than the others of the Glo- 
££ bule of Blood; and, confequently, their Nifus 
e£ to one another ceafing, the condens’d Globule of 
<£ Air will expand itfelf with a very confiderable 
force; whereby each Vehicle of the Fibre will be 
££ diftended. 
* What the foregoing Authors call Fermentation, Effervefcence, 
<&c. this Author calls Rarefadtion. Bernouilli endeavours to explain 
it by the Spicula of the nervous Juice ftriking againft the finer Par- 
ticles of the Blood; and this Author, by the Attraction and Nifus 
between the Animal Spirits and the Drop of Blood when they meec 
in the Veficle : So that, in the Whole, they may be confider’d to 
fpeak the fame thing (and even not to differ much from their Pre- 
deceffors) ; for it is no great Matter whether the Globule of Air is 
treed from its Confinement, by Spicule opening the Pores of the 
Blood, or by the Attraction of Particles to each other. 
