1ceiver ſeem more opacous at the very
moment of the ruſhing out of the Air:
For conſidering that the whiteneſs, whoſe
cauſe we enquire of, did but ſometimes ap
pear, it ſeem'd not impoſſible but that at
ſuch times the Air in the Receiver might
abound with Particles, capable of re
flecting the Light in the manner requiſite
to exhibit a white colour, by their being
put into a certain unuſual Motion. As
may be in ſome meaſure illuſtrated by
this, That the new motion of the freſhly
mention'd Fumes, made the inſide of the
Receiver appear ſomewhat darker then
before: And partly by the nature of our
formerly mention'd ſmoking Liquor,
whoſe parts though they ſeem'd tranſpa
rent whil'ſt they compoſ'd a Liquor, yet
when the ſame Corpuſcles, upon the un
ſtopping of the Glaſs, were put into a
new motion, and diſpoſ'd after a new
manner, they did opacate that part of the
Air they mov'd in, and exhibited a great
er whiteneſs then that which ſometimes
appears in our Pneumatical Veſſel. Nor
ſhould we content our ſelves with this ſin
gle Inſtance, to manifeſt, That little Bo
dies, which being rang'd after one manner,
are Diaphanous and Colourleſs, may, by
moment of the ruſhing out of the Air:
For conſidering that the whiteneſs, whoſe
cauſe we enquire of, did but ſometimes ap
pear, it ſeem'd not impoſſible but that at
ſuch times the Air in the Receiver might
abound with Particles, capable of re
flecting the Light in the manner requiſite
to exhibit a white colour, by their being
put into a certain unuſual Motion. As
may be in ſome meaſure illuſtrated by
this, That the new motion of the freſhly
mention'd Fumes, made the inſide of the
Receiver appear ſomewhat darker then
before: And partly by the nature of our
formerly mention'd ſmoking Liquor,
whoſe parts though they ſeem'd tranſpa
rent whil'ſt they compoſ'd a Liquor, yet
when the ſame Corpuſcles, upon the un
ſtopping of the Glaſs, were put into a
new motion, and diſpoſ'd after a new
manner, they did opacate that part of the
Air they mov'd in, and exhibited a great
er whiteneſs then that which ſometimes
appears in our Pneumatical Veſſel. Nor
ſhould we content our ſelves with this ſin
gle Inſtance, to manifeſt, That little Bo
dies, which being rang'd after one manner,
are Diaphanous and Colourleſs, may, by