[ 8 ] 
flrongly attrad. the other component Particles, is 
evident, it being well known, that the moft ftrongiy 
repelling and elaftic Particles, when in a feparate 
State, are the moft ftrongiy attracting, when fixed to 
other BodieSc 
XYI1L 
"Now, according to Dr. Hales , finee a much greater 
Proportion of Air is found in the folid than in the 
fluid Parts of Bodies 5 may we not with good Rea- 
fon conclude, that it is veiy inftrumental, as a Band 
of Union in thofe Bodies ; thofe Particles (as Sir 
Ifaac Newton obferves *) receding from one ano- 
ther with the greateft repuifive Force, and being moft 
difficultly brought together, which upon Contad 
cohere moft ftrongiy ? And if the Attradion or Co- 
hefion of an unelaftic Air-Particle be proportionable 
to its repuifive Force in an elaftic State, then fince 
its elaftic Force is found to be vaftly great, fo muft 
that of its Cohefion alfo. Let us add to this, that 
the Air generated from the fleffiy Fibres, in the Ex- 
periment above-mention'd, was not Separated with- 
out great Violence 5 for it did not rife in any Quan- 
tity, till the Clouds did, which contain'd and brought 
over the Salt and Oil : Whence it is evident that the 
aereal Particles are firmly fix’d, and confequently are 
very inftrumental in the Union of the other con- 
ftituent Principles* 
4 
* Opt. r. 
