I 
[ 36 7 
contain’d Fluids mult be prefled out, in proportion; 
to the Contraction of the Mufcle. 
LXXXII. 
This appears upon Blood-letting, when fqueezing 
any thing hard in the Hand will make the Blood fly 
out with a greater Velocity, and thereby form a; 
larger ‘Parabola. 
IXXXIII.. 
' This alfo accounts clearly for the Induration and 
Palenefs of a Mufcle during its ACtion. 
TXXXIV. 
And again, it follows hence, that irr the A&ion 
of the- Mufcles there is an alternate ‘Diaftole and 
Syftole perfectly analogous to the ACtion of the Heart r 
which greatly contributes towards pulhing on the 
Blood in the Veins. 
LXXXV. 
The Mufcles being contracted merely by the In- 
fluence of the nervous z_/Ether, and the influx of 
the z_/Ether being ftopt by withdrawing the Impe- 
tus given to it by the Power of the Will; the Rea* 
fon and Manner of their Relaxation will ealily ap- 
pear. For fince the nervous Fluid is extremely fub- 
tile, that Portion of it which is thrown into the 
mufcular Fibres, aCls but for a Moment, or the leaft 
Space 
