. wile “ e 
‘ . a | 
Century V 1 LT. 
| 
(IS ne eee lll a tl . : Ea 
-|comprcffion of parts thenit hath of it felf, and therefore needeth so 
to bepurin motion. Forif a weighty Body be penfile, and hang but bya 
|thred, the percuffion will make an impulfion very near as cafily as ifit were 
-|already in motion. | ih 
A Body over-great or over-fmal), will not be thrown fo far asa Bodyof, 74: 
tamiddlefizes {o that (it fecmeth) there mutt be acommenfuration or pro- 
) portion between the Body moved, and the force, tomake it move well. The. 
“bcaufe is, becaufe to the Impulfion there is requifite the force of the Bo dy 
‘| that moveth, and the refiftance of the Body that is moved ; and if the 
‘Body bé too great, ityieldethtoo little ; and if irbe too fmiall, it refilteth 
+} too little. Bah de : | 
It is common experience, that no weight will prefsorcut fo firong be- | 765, 
"| ing laid uponaBody, as falling or ftrucken from above. It may be the Air 
| hath fome part in furthering the percuflion: But the chief canfe I take to be, 
| for that the parts of the Body moved, have by impulfion, or by the motion 
} of gravity continued, acompreffioninthem as well downwaras,as they have 
| when they arethrown or fhot through the Air forwards. 1 conceive alfo, 
| thatthe quick loofe of that motion preventeth the rcfiftance of the Body be: 
| jows and priority of the force (always) is of great efficacy, as appeareth in 
| infinite inftances. ; 
766. 
Experiment 
Solitary, 
touching 
Tisillation. 
rp Tekling is mectt in the Soles of the Feet, and under the eArm-holes, and 
T onthe Sides. The caufeis, thethinnefs of theSkin in thofe parts, joyned 
with the rarenefs of being touched theres for all Tickling is a light motion 
J of the Spirits, which the thinnefs of the Skin, and fuddennefs and rarenefs 
lof touch doferther: For we fee a Feather or a Rufh drawn along the Lip 
| or Cheek, doth tickle ; whereas athing more obtufe; or a touch more 
jhard,dothnot. And for fuddennefs, we fee no man canticklehimfelf: We 
1 fee alfa, that the Palm of the Hand, thoughit hath as thin a Skin as the other | 
ot mentioned, yet isnot ticklifh, becanfe it is accuftomed to be touched. | 
‘Tickling alfo caufeth Langhter. The caule may be the emiffion of the Spirits, | 
‘and fo of the Breath, by a flight from Titillation ; for upon Tickling, we 
} fee there is ever aftarting or fhrinking away of the part to avoid it ; and 
we fee alfo, that if you tickle the Noftrils with a Feather or Straw, it. 
‘|procureth SneeXing, which is a fudden emiffion of the Spirits, that do 
}ilikewife expel the moifture. And Tickling is ever painful, and not well 
‘| endured. | 
569. 
Experiment 
Solitary, | 
touching the | - 
Scarcity of 
Rain in 
Egypt. 
“) YT isttrange, tharthe River of Nitws overflowing, asit doth the Countrey 
‘|B of Egypt, there fhould Beneverthelefs little or no Rain inthat Countrey. 
‘4 The caule muft be, either in the Nature of the Water, or in the Nature 
j,of the Air, or of both. In the Water, it may be afcribed either unto 
‘the long race of the Water; for fwifterunning Waters vapor not fo much 
| as ftanding Waters, or elfe tothe concoétion of the Water; for Waters well 
concofed, ‘vapor not fo much as Waters raw, no more then Waters upon 
ithe fire do vapor fo much, after fome time of boyling, as atthe firft. 
}And itistrue, char the Water of Nilw is fweeter then other Waters intatte j 
y and it is excellent good for the Stone, and Hypochondriacal Melancholy, 
j which fheweth it is lenifying ; and it runneth through a Countrey of a 
}hot Climate, and flat, without fhade eithér of Woods or Hills, whereby 
Sun muft needs have great power to concoé it. As forthe Air (from 
" rhence I conceive this wantof Showers cometh chiefly) the caufe muft be, 
2 for 
ee tw ee - ee ee IOS oe 
