r^i;4 ) 
ro0tion explaii^ing the manner how it is performM ^ and endea^' 
TOuring to folve the difficulties occurring therein: where hee^amins' 
both what D^x-C/^r^^/ hath devifed on this fubjed: by affigning a di* 
r^ffion to the wagging J and what Gaffendm and DrJ 
Willis hivt fiiggeikd on the fame, by the flamraeohs motion or explol 
fionof the Spirits • the former feeming to him altogether fiftitious 
Chow ingenious.foever ^) the latter leaving it hardly conceivable 
to him, how jfo conftant and ?ven a motion of the Mufcles in a found 
body caj> proceed from fo violent a caufe j nor how the Soul would 
be aM^ to.keepfuch a ecJiTima^d over her motions, if they did depend 
frmd an Accenfion of the Spirits or. a violent Explbfion. Mean 
tim, hefindsitvery difficult to make it out, what it is indeed, that 
q'aufeth the Motion of the Mufcles 5 yet conceives at laft, that 'tis 
the Contraction of their jfibres, that produces it ^ but whether that 
be done by the acceffion of fome fubllance, orby a change of angles 
in the fibres, is a new difficulty, which the Learned i'^d';^?^ fcruples to 
determine any thing in, though Dr. ^/////declare for the former opi- 
-nion. After this, he enumerates many things, that remain yet un- 
known to us in the ^Motion of the Mufcles. Which done, he con- 
cludes the whole with his ingenious Confiderations about the Motion 
of Walking, Flying, Swimming , Creeping. ^(r> annexing thereto 
Mis dodrine of Paflions. 
ERRATA inthUNumb.g^. 
Fag.^i4i'Uo. T.eiidcntius. p.6i^6i 1. penult, r.pkufii.lhid. xUusufio mcnfi. 
L 0 N B O N , 
mud fdr.-,._.^^^^ to Rojal 
