5 8 Hcemajlatks. 
lary Veflels, in this IXth Experiment, Numb. 
1 8. whence we fee both from Experiment and 
Calculation, that the Force of rhe Blood in 
thefe fine Capillaries can be but very little, and 
the longer fuch Capillaries are, the flower will 
the Motion of the Blood be in them. 
24. It is obfervable that thefe parallel Ar- 
teries are not as in the Bowels, Lungs and 
other membranous parts of the Body, inter- 
mixed with correfponding fimilar Veins 5 but 
two different Series’s of thefe Arteries, arifing 
at right Angles from larger Arteries, one Se- 
ries from the upper, and the other from the 
lower parts of the Mufcles, their parallel Ar- 
teries do mutually and alternately intermix^ 
whereby the Blood is conveyed in them alter- 
nately upwards and downwards, and thence 
flows at right Angles into the Veins. 
zy. From this very fmall Force of the ar- 
terial Blood among the mufcular Fibres we may 
with good reafon conclude, how fliorc this 
Force is of producing fo great an Elfeft, as 
that of mufcular Motion, which wonderful 
and hitherto inexplicable Myftery of Nature, 
muft therefore be owing to fomc more vigo- 
rous and adiv.e Energy, whofe Force is regu- 
lated by the Nerves ; But whether it be con- 
fined 
