7339Century II.
There is a Church at Gloceſter, (and as I have heard, the like is in ſome
11148. other places) where if you ſpeak againſt a Wall ſoftly, another ſhall hear
your voice better a good way off, than near hand. Inquire more particu-
larly of the fame of that place. I ſuppoſe there is ſome Vault, or Hollow,
or lſle, behinde the Wall, and ſome paſſage to it, to wards the further end of
that Wall againſt which you ſpeak: So as the voice of him that ſpeaketh
ſlideth along the Wall, and then entreth at ſome paſſage, and communi-
cateth with the Air of the Hollow; for it is preſerved ſomewhat by the
plain Wall; but that is too weak to give a Sound audible, tillit hath com-
municated with the back Air.
11148. other places) where if you ſpeak againſt a Wall ſoftly, another ſhall hear
your voice better a good way off, than near hand. Inquire more particu-
larly of the fame of that place. I ſuppoſe there is ſome Vault, or Hollow,
or lſle, behinde the Wall, and ſome paſſage to it, to wards the further end of
that Wall againſt which you ſpeak: So as the voice of him that ſpeaketh
ſlideth along the Wall, and then entreth at ſome paſſage, and communi-
cateth with the Air of the Hollow; for it is preſerved ſomewhat by the
plain Wall; but that is too weak to give a Sound audible, tillit hath com-
municated with the back Air.
Strike upon a Bow-ſtring, and lay the Horn of the Bow near your Ear,
22149. and it will increaſe the Sound, and make a degree of a Tone. The cauſe is
for that the ſenſory, by reaſon of the cloſe holding is percuſſed, before the
Air diſperſeth. The like is, if you hold the Horn betwixt your Teeth. But
that is a plain Dilation of the Sound, from the Teeth to the Inſtrument of Hear-
ing; for there is a great entercourſe between thoſe two parts, as appeareth
by this, that a harſh grating Tuneſetteth the Teeth one edge. The like
falleth out, if the Horn of the Bow be put upon the Temples; but that is but
the ſlide of the Sound from thence to the ear.
22149. and it will increaſe the Sound, and make a degree of a Tone. The cauſe is
for that the ſenſory, by reaſon of the cloſe holding is percuſſed, before the
Air diſperſeth. The like is, if you hold the Horn betwixt your Teeth. But
that is a plain Dilation of the Sound, from the Teeth to the Inſtrument of Hear-
ing; for there is a great entercourſe between thoſe two parts, as appeareth
by this, that a harſh grating Tuneſetteth the Teeth one edge. The like
falleth out, if the Horn of the Bow be put upon the Temples; but that is but
the ſlide of the Sound from thence to the ear.
If you take a Rod of Iron or Braſs, and hold the one end to your ear
33150. and ſtrike upon the other, it maketh a far greater Sound, than the like ſtroke
upon the Rod, not made ſo contiguous to the Ear. By which, and by ſome
other inſtances that have been partly touched, it ſhould appear; that Sounds
do not onely ſlide upon the ſurface of a ſmooth Body, but do alſo commu-
nicate with the Spirits that are in the Pores of the Body.
33150. and ſtrike upon the other, it maketh a far greater Sound, than the like ſtroke
upon the Rod, not made ſo contiguous to the Ear. By which, and by ſome
other inſtances that have been partly touched, it ſhould appear; that Sounds
do not onely ſlide upon the ſurface of a ſmooth Body, but do alſo commu-
nicate with the Spirits that are in the Pores of the Body.
I remember in Trinity-Colledge in Cambridge, there was an upper Cham-
44151. ber, which being thought weak in the Roof of it, was ſupported by a Pillar
of Iron, of the bigneſs of ones arm, in the midſt of the Chamber, which,
if you had ſtruck, it would make a little flat noiſe in the Room where it was
ſtruck; but it would make a great bomb in the Chamber beneath.
44151. ber, which being thought weak in the Roof of it, was ſupported by a Pillar
of Iron, of the bigneſs of ones arm, in the midſt of the Chamber, which,
if you had ſtruck, it would make a little flat noiſe in the Room where it was
ſtruck; but it would make a great bomb in the Chamber beneath.
The ſound which is made by Buckets in a Well, when they touch upon
55152. the Water, or when they ſtrike upon the ſide of the Well, or when two
Buckets daſh the one againſt the other. Theſe Sounds are deeper and fuller,
than if the like Percuſſion were made in the open Air: The cauſe is the
penning and encloſure of the Air in the Concave of the Well,
55152. the Water, or when they ſtrike upon the ſide of the Well, or when two
Buckets daſh the one againſt the other. Theſe Sounds are deeper and fuller,
than if the like Percuſſion were made in the open Air: The cauſe is the
penning and encloſure of the Air in the Concave of the Well,
Barrels placed in a Room under the Floor of a Chamber, make all
66153. noiſes in the ſame Chamber more full and reſounding.
66153. noiſes in the ſame Chamber more full and reſounding.
So that there be five ways (in general) of Majoration of Sounds, Encloſure
Simple, Encloſure in the Dilatation, Communication, Reflexion, Concurrent, and Ap-
proach to the Senſory.
Simple, Encloſure in the Dilatation, Communication, Reflexion, Concurrent, and Ap-
proach to the Senſory.
For Exility of the Voice, or other Sounds:
It is certain, that the Voice
77154. doth paſs thorow ſolid and hard Bodies, if they be not too thick; and thorow
Water, which is likewiſe a very cloſe Body, and ſuch an one as letteth not
in Air. But then the Voice or other Sound is reduced, by ſuch paſſage to a
great weakneſs or exility. If therefore you ſtop the Holes of a Hawks Bell,
it will make no ring, but aflat noiſe or rattle. And ſo doth the Ætities or
Eagles Stone, which hath a little ſtone within it.
77154. doth paſs thorow ſolid and hard Bodies, if they be not too thick; and thorow
Water, which is likewiſe a very cloſe Body, and ſuch an one as letteth not
in Air. But then the Voice or other Sound is reduced, by ſuch paſſage to a
great weakneſs or exility. If therefore you ſtop the Holes of a Hawks Bell,
it will make no ring, but aflat noiſe or rattle. And ſo doth the Ætities or
Eagles Stone, which hath a little ſtone within it.
And as for Water, it is a certain Tryal:
Let a man go into a Bath, and
88155. take a Pail and turn the bottom upward, and carry the mouth of it
(even) down to the level of the Water, and ſo preſs it down under the
Water ſome handful and an half, ſtill keeping it even, that it may not tilt
on either ſide, and ſo the Air get out: Then let him that is in the Bath,
88155. take a Pail and turn the bottom upward, and carry the mouth of it
(even) down to the level of the Water, and ſo preſs it down under the
Water ſome handful and an half, ſtill keeping it even, that it may not tilt
on either ſide, and ſo the Air get out: Then let him that is in the Bath,