1come directly in a ſtraight Line from the
Watch unto the Ear. And it was obſerva
ble to this purpoſe, that we found a mani
feſt diſparity of noiſe, by holding our Ears
near the ſides of the Receiver, and near the
Cover of it: which difference ſeem'd to
proceed from that of the Texture of the
Glaſs, from the ſtructure of the cover (and
of the Cement) through which the ſound
was propagated from the Watch to the
Ear. But let us proſecute our Experiment.
The Pump after this being imployd, it
ſeemd that from time to time the ſound
grew fainter and fainter; ſo that when the
Rec iver was empty'd as much as it uſ'd
to be for the foregoing Experiments, nei
ther we, nor ſome ſtrangers that chanc'd
to be then in the room, could, by applying
our Ears to the very ſides, hear any noiſe
from within; though we could eaſily per
ceive that by the moving of the hand
which mark'd the ſecond minutes, and by
that of the ballance, that the Watch nei
ther ſtood ſtil, nor remarkably varied from
its wonted motion. And to ſatisfie our
ſelvs further that it was indeed the abſence
of the Air about the Watch that hinder'd
us from hearing it, we let in the external
Air at the Stop-cock, and then though we
Watch unto the Ear. And it was obſerva
ble to this purpoſe, that we found a mani
feſt diſparity of noiſe, by holding our Ears
near the ſides of the Receiver, and near the
Cover of it: which difference ſeem'd to
proceed from that of the Texture of the
Glaſs, from the ſtructure of the cover (and
of the Cement) through which the ſound
was propagated from the Watch to the
Ear. But let us proſecute our Experiment.
The Pump after this being imployd, it
ſeemd that from time to time the ſound
grew fainter and fainter; ſo that when the
Rec iver was empty'd as much as it uſ'd
to be for the foregoing Experiments, nei
ther we, nor ſome ſtrangers that chanc'd
to be then in the room, could, by applying
our Ears to the very ſides, hear any noiſe
from within; though we could eaſily per
ceive that by the moving of the hand
which mark'd the ſecond minutes, and by
that of the ballance, that the Watch nei
ther ſtood ſtil, nor remarkably varied from
its wonted motion. And to ſatisfie our
ſelvs further that it was indeed the abſence
of the Air about the Watch that hinder'd
us from hearing it, we let in the external
Air at the Stop-cock, and then though we