‘OAR he 2 Clete a 
- ; . A Fi j 
/ asian 
dy 
\ 
Century iy 
| and fprinkle up ina fine Dew: This inftance doth excellently demonstrate 
| the force of Comprefion in a folid Body. For whenfoever a folid Body (as 
-| Wood, Stone, Metal, &c.) is ptedled, there is aninward tumult in the parts 
‘| thereof, feeking todelivecthemfelves fromthe Compreflion: And this is 
the caufe of all Yiolent Motion. Wherein it is ftrange in the higheft degree, 
_} that this Motion hath-never been obferved, nor enquired; it being of all 
| Motions, the moft common, and the chief rootof all; Mechanical Operations. | 
| This Motion worketh in roundat firft, by way of Proof andSearch, which 
| way to deliver it felf, and then worketh in Progrefs, where it findeth the 
| deliverance eafieft. In Liquors this Motion is vifible ; for all Liquors ftruck- 
Wp, make round circles, and withal dath, butin Solids (whichbreaknot) it is 
‘VW fubtile, as ix is invifible ; but neverthelefs bewrayeth it {elf by many |. 
| effets, asinthisinftancewhereot we {peak. Forthe Preffure of the Finger 
| furthered by the wetting (becaufe it fticketh fo much the better unto the 
Lip of the Glafs) afterfome continuance, putteth all the {mall parts of the | 
Glafsinto work, thatthey ftrike the Water tharply; trom which Pércufion, 
that fprinkling cometh. | 
: If you ftrike or pierce a Selid Body that is brittle, as Glafs or Sugar, it 
| breaketh not onely where the immediate force is, but breaketh all about 
| into fhivers and fitters ; the Motion upon the Preflure f{earching all ways, 
and breaking where it findeth the Body weaketft. 
The Powder in Shot being dilated into fucha Flame, as endureth not. 
Compreflion, moveth likewife in round (the Flame being inthenature of 
a Liquid Body) fometimes recoyling, fometimes breaking the Peece, but 
generally difcharging the Bullet, becaufe there it findeth eaticft deliver- 
ance. 
_ This Motion upon Preffure, andthe Reciprocal thereof, which is Mo- 
tien upon Tenfure; weufe tocall (by onecommon name) Aforon of Liber- 
_|93 which is, when any Body being forced to a Presernasural Extent or Di- 
| menfion, delivereth and reftoreth it {elf to the natural: As when a blown 
| Bladder (preffed) rifeth again ; or when Leather or Cloth tentured, {pring 
back. "Thefe two Motions (of which there be infinite inftances) we fhall 
handle in due place. . 3 : 
| This Motionupon Preflure is excellently alfo demonftrated in Sounds : 
As when one chimeth upon a Bell, ie foundeth ; but as foon as he Jayeth his 
aand vponit, the Sonndceafeth: And fo, thefound of a Virginal String, as 
| foonas the Quill of the Jack falleth fromit, toppeth. For thefe founds are 
| produced by the fubtile Percuffion of the Minute parts of the Bell or String 
upon the Air; All one, as the Water is caufed to leap by the fubtile Percufl- 
on of the Minute parts of the Glafs uponthe ater, whereof we {pake a lit- 
| tle before in the Ninth Experiment. For you muft not take it to be the local 
| fhaking of the Bell or String thardoth it. As we fhall fully declare when 
| we come hereafter to handle Sounds. " Ms 
Io. 
Il. 
“EtAke a Gief with a Belly, and a long Neb, fill the Bely (in part) with 
Water: Takealfo another Glsf, whereinto putClaret Wine and Water 
mingled. Revyerfe the firft Glafs, with the Belly upwards, {topping the 
| Neb with your Finger; then dip the mouth of it within the fecond Glafs, 
-|and remove your Finger. Continue it in that pofture for atime, and it 
willunmingle the Wine from the Water; the Wineafcending and{etlingin 
| the top of the upper Glafs, and the Water defcending and fetling in the 
bottom of the lower Glafs. . The oer is apparent to the Eye ; for 
‘A pte De -* aR you 
. iY 
F4. 
Experiments 
in Confort, 
touching Se- 
parations of 
Bodies . by 
weighs. ; 
et 
a Hay coe 
; ’ 
_ ms 
3 
