[ 7 ] 
X. 
Iii fpeaking of thefe Spirits, he fays, That the ali- 
mentary Juices abound with very fubtil aftive Parti- 
cles} which, by their frequent Circulation with the 
Blood, are gradually freed from the terreftrial Parts, 
wherein they were confined. Thefe are in great 
Plenty in the arterial Blood} which, being carried 
through the Arteries of- the Brain, dcpolites in its 
medullary Subftance, by a flow Kind of Diftillation, 
a Fluid, which our Author calls a Mercurial Liquor, 
that is (fays he) exquifitely impregnated with a vola- 
tile Salt and Sulphur , which flows from thence into 
all the Nerves of the Body, palling every way through 
them flowly, and at length falling into the Veins by 
a gentle Circulation, till they arrive again at the 
Heart : And that, by thefe fpirituous Liquors, all the 
Parts of the animal Body grow very turgid, and are 
kept in continual Agitation, alTifled by the Circu- 
lation, and the Calor nativus. And this Agitation is 
what he calls the very Life. 
XI. 
And although this Author allows the Nerves to 
abound thus with this rich reTUfyd Juice , yet he denies 
that they are regularly tubular, as Authors affirm, but 
only as they are defined above 5 and a!fo that any 
Kind of Cavity can exift in a Mufcle; and, confe- 
quently, that there can be no Inflation of its Parts : 
But is of Opinion, that in every Mufcle there are 
three Kinds of Spirits} one peculiar to the Tendons 
and their Fibres, another to the Mufcular Flefk , and 
another which comes to the Mufcle by the Nerves. 
2 XII. 
