Bacon, Francis
,
Sylva sylvarum : or, a natural history in ten centuries
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<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 562
>
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33
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Century II.
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but runneth in ſilence, if it be of any depth; </
s
>
<
s
xml:id
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echoid-s1701
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xml:space
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">but the very Stream upon Shal-
<
lb
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lows, or Gravel, or Pebble, will be heard. </
s
>
<
s
xml:id
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echoid-s1702
"
xml:space
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preserve
">And Waters, when they beat up-
<
lb
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on the Shore, or are ſtraitned, (as in the falls of Bridges) or are daſhed againſt
<
lb
/>
themſelves by Winds, give a roaring noiſe. </
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<
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xml:id
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echoid-s1703
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xml:space
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preserve
">Any peece of Timber, or hard
<
lb
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Body, being thruſt for wards by another Body continguous, without knock-
<
lb
/>
ing giveth no noiſe. </
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<
s
xml:id
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echoid-s1704
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xml:space
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preserve
">And ſo Bodies in weighing, one upon another, though
<
lb
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the upper Body preſs the lower Body down, make no noiſe. </
s
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<
s
xml:id
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echoid-s1705
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xml:space
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preserve
">So the motion
<
lb
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of the Minute parts of any ſolid Body, (which is the principal cauſe of violent
<
lb
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Motion, though unobſerved) paſſeth without ſound: </
s
>
<
s
xml:id
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echoid-s1706
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xml:space
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preserve
">For that ſound, that is
<
lb
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heard ſometimes, is produced onely by the breaking of the Air, and not by
<
lb
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the impulſion of the parts. </
s
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<
s
xml:id
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echoid-s1707
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xml:space
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preserve
">So it is manifeſt, that where the anterior Body
<
lb
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giveth way as ſaſt as the poſterior cometh on, it maketh no noiſe, be the
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motion never ſo great or ſwift.</
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<
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<
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<
s
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echoid-s1709
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xml:space
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">Air open and at large, maketh no noiſe, except it be ſharply percuſſed;
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</
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<
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echoid-s1710
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xml:space
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xlink:label
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note-0067-01a
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xml:space
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">116.</
note
>
as in the ſound of a ſtring, where Air is purcuſſed by a hard and ſtiff Body, and
<
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with a ſharp looſe: </
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<
s
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xml:space
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">For it the ſtring be not ſtrained, it maketh no noiſe; </
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<
s
xml:id
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echoid-s1712
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xml:space
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preserve
">but
<
lb
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where the Air is pent and ſtraitned, there breath or other blowing (which
<
lb
/>
carry but a gentle percuſſion) ſuffice to create ſound; </
s
>
<
s
xml:id
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echoid-s1713
"
xml:space
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">as in Pipes and Wind
<
lb
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Inſtruments. </
s
>
<
s
xml:id
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echoid-s1714
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xml:space
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preserve
">But then you muſt note, that in Recorders which go with a
<
lb
/>
gentle breath, the Concave of the Pipe (were it not for the Fipple that ſtrait-
<
lb
/>
neth the Air much more then the ſimple Concave) would yield no ſound.
<
lb
/>
</
s
>
<
s
xml:id
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echoid-s1715
"
xml:space
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">For, as for other Wind-Inſtruments, they require a forcible breath, as Trum-
<
lb
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pets, Cornets, Hunters, Horns, & </
s
>
<
s
xml:id
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xml:space
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">c. </
s
>
<
s
xml:id
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echoid-s1717
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xml:space
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preserve
">Which appeareth by the blown Cheeks of
<
lb
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him that windeth them. </
s
>
<
s
xml:id
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echoid-s1718
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xml:space
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preserve
">Organs alſo are blown with a ſtrong wind by the
<
lb
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Bellows. </
s
>
<
s
xml:id
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echoid-s1719
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xml:space
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">And note again, that ſome kinde of Wind-Inſtruments are blown
<
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at a ſmall hole in the ſide, which ſtraineth the breath at the firſt entrance; </
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>
<
s
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xml:space
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<
lb
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the rather, in reſpect of their traverſe, and ſtop above the hole which per-
<
lb
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formeth the Fipples part; </
s
>
<
s
xml:id
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echoid-s1721
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xml:space
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">as it is ſeen in Flutes and Fifes, which will not give
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lb
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ſound by a blaſt at the end, as Recorders do, &</
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>
<
s
xml:id
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echoid-s1722
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xml:space
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">c. </
s
>
<
s
xml:id
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echoid-s1723
"
xml:space
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">Likewiſe in all Whiſtling,
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lb
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you contract the Mouth; </
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>
<
s
xml:id
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echoid-s1724
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xml:space
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">and to make it more ſharp, Men ſometimes uſe their
<
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finger.</
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<
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</
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<
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<
s
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xml:space
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">But in open Air, if you throw a Stone or a Dart, they give no ſound:
<
lb
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</
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<
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xml:space
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<
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xml:space
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">117.</
note
>
No more do Bullets, except they happen to be a little hollowed in the caſt-
<
lb
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ing; </
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<
s
xml:id
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echoid-s1728
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xml:space
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">which hollowneſs penneth the Air: </
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<
s
xml:id
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echoid-s1729
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xml:space
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">Nor yet Arrows, except they be
<
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ruffled in their Feathers, which like wiſe penneth the Air. </
s
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<
s
xml:id
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echoid-s1730
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xml:space
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">As for ſmall Whi
<
lb
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ſtles or Shepherds Oaten-Pipes, they give a ſound, becauſe of their extream
<
lb
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ſlenderneſs, whereby the Air is more pent than in a wider Pipe. </
s
>
<
s
xml:id
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echoid-s1731
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xml:space
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">Again, the
<
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voices of Men and Living Creatures, paſs through the Throat, which pen.
<
lb
/>
</
s
>
<
s
xml:id
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echoid-s1732
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xml:space
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">neth the breath. </
s
>
<
s
xml:id
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echoid-s1733
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xml:space
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">As for the Jews-Harp, it is a ſharp percuſſion, and beſides hath
<
lb
/>
the vantage of penning the Air in the Mouth.</
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>
<
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echoid-s1734
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xml:space
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</
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<
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<
s
xml:id
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echoid-s1735
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xml:space
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">Solid Bodies, if they be very ſoftly percuſſed, give no ſound; </
s
>
<
s
xml:id
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echoid-s1736
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xml:space
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">as when a
<
lb
/>
<
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xlink:label
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note-0067-03a
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xml:space
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">118.</
note
>
Man treadeth very ſoftly upon Boards. </
s
>
<
s
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echoid-s1737
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xml:space
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">So Cheſts or Doors in fair weather,
<
lb
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when they open eaſily, give no ſound. </
s
>
<
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xml:id
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xml:space
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">And Cart-wheels ſqueek not when
<
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they are liquored.</
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<
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xml:space
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</
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<
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<
s
xml:id
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xml:space
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">The Flame of Tapers or Candles, though it be a ſwift motion and breaketh
<
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<
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xml:space
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">119.</
note
>
the Air, yet paſſeth without ſound. </
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>
<
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xml:space
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">Air in Ovens, though (no doubt) it doth
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(as it were) boil, and dilate it ſelf, and is repercuſſed, yet it is without noiſe.</
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<
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xml:space
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</
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<
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<
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xml:id
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xml:space
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">Flame percuſſed by Air, giveth a noiſe; </
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<
s
xml:id
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xml:space
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">As in blowing of the Fire by Bel-
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lows, greater than if the Bellows ſhould blow upon the Air it ſelf. </
s
>
<
s
xml:id
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"
xml:space
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">And ſo
<
lb
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likewiſe Flame percuſſing the Air ſtrongly (as when Flame ſuddenly taketh
<
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and openeth) giveth a noiſe: </
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<
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xml:id
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xml:space
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">So great Flames, whiles the one impelleth the
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other, give a bellowing ſouud.</
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