C *5 ] 
muft depend upon Tenfion; for the Fibres could 
have no Power to tetrad, or abbreviate their Length 
unlefs they were extended beforehand by fome cer- 
tain Force, 
XXXIII. 
It is not a fufficient Objection agalnft this Scheme 
to fay, that if we depend upon what is viftble, we 
fhall never fee the dry folid Fibres, or Particles of 
any foiid Body, once divided or drawn out of Con- 
rad, coalefce or unite again, or recover the clofe 
Contads they had before 5 without fome fluid Me- 
dium foperadded. 
XXXIV. 
5 Tis true, when a vifible Crack or Flaw happens 
in any dry, hard, folid Body, fuch as a Steel-Spring, 
or a dry, rigid, wooden Bow, the Rupture will al- 
ways continue, by reafon the fever'd Particles can- 
not be brought again into the Sphere of each other's 
Attradion without the Intervention of fome Me- 
dium 5 but then it does not follow from hence, that 
fuch a Spring or Bow cannot be bent at all with- 
out breaking 5 or that the conftituent Particles, which 
muft neceflarily be difplaced by fuch a diftending 
Power, do not fly together again by their attradive 
Virtue, when removed only to fuch minute DiL 
tances. 
XXXV. 
The Minima , or primary Atoms of all Bodies are 
non-elaftic, as being perfedly hard, folid, and infe- 
parable; and therefore Elafticity muft proceed from 
the Aggregate, or Compofition of fuch Atoms, which. 
