■ [H] 
correfponding to their attractive Virtue, it follows, 
that wherever a mufeuiar Fibre is ftretched out to 
the leaft Degree of Tenfion, fome of its Particles 
will touch each other in fewer Points; whilft others 
may poffibly be difunited and removed from each 
other, though perhaps, to inconceivable finall Dtf- 
tances : Hence there will be a conftant Nifus in the 
Separated Particles to get together again y and this 
Vis RejUtutionis will be Wronger or weaker, ac- 
cording to the Number of Corpufcles fo disjoined* 
and their attradive Virtue. 
XXXI. 
If the Power of the circulating Fluids (and l-think 
it cannot be denied) be fufficient, from the firft Be- 
ginning of the Circulation of the Foetus, and fo on 
as long as Life continues, to diftend the Fibres be- 
yond the Size they would other wife be of, by rqa- 
fon of their corpufcular Attradion; this diftradile 
Power tnuft always be the Occafion of fome De- 
gree of Tenfion in them : And if, upon the Remo- 
val of this Tenfion, the component Particles have a 
Property of running clofer together, and contrad- 
ing the Fibres in their Length, by the means above- 
mentiorfd, this muft be the true Cauj: of Elafticity 
in the Fibres. 
XXXII. 
Hence therefore it follows, that fince the Fibres 
arc always in a State of Diftradion, by the Quantity 
and Momentum of the circulating Fluids, and as they 
are ever endeavouring to fhorten themfelves, by 
means of their corpufcular Attradion, their Elafticity 
muft 
