1ſince we are informed, that in the German
Experiment, commended at the begin
ning of this Letter, the Ingenious Tryers
of it found, That their Glaſs Veſſel, of
the capacity of 32 meaſures, was lighter
when the Air had been drawn out of it,
then before, by no leſs then one ounce
and (3/10) that is, an ounce and very near a
third: But of the gravity of the Air, we
may elſewhere have occaſion to make fur
ther mention.
Experiment, commended at the begin
ning of this Letter, the Ingenious Tryers
of it found, That their Glaſs Veſſel, of
the capacity of 32 meaſures, was lighter
when the Air had been drawn out of it,
then before, by no leſs then one ounce
and (3/10) that is, an ounce and very near a
third: But of the gravity of the Air, we
may elſewhere have occaſion to make fur
ther mention.
Taking it then for granted that the Air
is not deyoid of weight, it will not be
uneaſie to conceive, that that part of the
Atmoſphere wherein we live, being the
lower part of it, the Corpuſcles that com
poſe it, are very much compreſſ'd by the
weight of all thoſe of the like nature that
are directly over them, that is, of all the
Particles of Air, that being pil'd up up
on them, reach to the top of the Atmoſ
phere. And though the height of this
Atmoſphere, according to the famous
Kepler, and ſome others, ſcarce exceeds
eight common miles; yet other eminent
and later Aſtronomers, would promote
the confines of the Atmoſphere, to ex
ceed ſix or ſeven times that number of
miles. And the diligent and learned
is not deyoid of weight, it will not be
uneaſie to conceive, that that part of the
Atmoſphere wherein we live, being the
lower part of it, the Corpuſcles that com
poſe it, are very much compreſſ'd by the
weight of all thoſe of the like nature that
are directly over them, that is, of all the
Particles of Air, that being pil'd up up
on them, reach to the top of the Atmoſ
phere. And though the height of this
Atmoſphere, according to the famous
Kepler, and ſome others, ſcarce exceeds
eight common miles; yet other eminent
and later Aſtronomers, would promote
the confines of the Atmoſphere, to ex
ceed ſix or ſeven times that number of
miles. And the diligent and learned