[ 41 3 
“ fels, now turgid with elaftic Blood, who fe Area's 
« have been thus forcibly enlarg'd, endeavour to con- 
“ trad themlelves every Way towards the Centres of 
“ their Areas, which are the Centres of the Veli- 
<£ cies 5 and the Mind .giving: no Refinance, this Nifus 
1 • takes Place, to the complete Contraction of each 
<c Fibre; by which means the Limb affix'd is brought 
“ into complete Flexion, or Extenlion, according as 
“ this or the other Antagonift has been aded upon. 
“ In this State the whole Mufclc becomes ffiorter 
“ and lefs in all irs Dimenfions; harder and paler by 
tc Expulfton of a great Part of its Fluids thro' the 
<£ Veins towards the Heart, and thro’ the Extremi- 
“ ties of the Nerves into the Tendon and Peri- 
“ ojieum 
Here he fuppofes the Spirits to fly off to the Ten- 
dons and Peri oft eum . 
XLIX. 
None of all thefe Authors have confider'd the State 
of a Mufcle. when at Reft ; which has contributed not 
a little to affift my Explanation of mufcular Motion. 
Our Author has nothing in his View, but the bare 
Progrefs of the Motion from the utmoft Extenficn to 
the utmoft Contradion of a Mufcle ; and, in the Ex- 
planation, tlie whole Progrefs fee ms intricate and te- 
dious. Again he, fuppofes thofe longitudinal and tranf- 
verfe Blood-veffds to be on the Surface of . the Vefi- 
cles, which do not appear by any Affiftance of the 
Microfcope we can apply. 
G - -X 
1; 
