Qenturj. V i 1 i. 
Bachy \vhsthcr(I fav) he Teeth things in the Aire greater* or iefie. For it 
isniainfeft, that when the Eye ftandeth in the Finer Medium, and the 
Obiecl is in the Groffer, things Thew greater * But contrariwile, when the 
Eye is placed m the Greffer Medium > and the obietti n th e Finer) how it 
worketh I know not. 
It would be wall botilted out, whether great Refractions may not bee 
| made vpon Reflections , as well as vpon Direft Beames. For Example, We 
I fee that take an Empty Bafen, put an AngclL of Gold , or what you Will, into 
it j Thengoe Tofarre from the Bafen * till you cannot lee the Angelf be- 
caufeit is not in a Right Line * Then fill the Bafen with Water, and you 
(lhallfceitout ut his Place, becaufeofthe Reflection, To proceed there- 
fore, put a Looking-Giaffc, into a Bafen of watery Ifuppofeyou (hall not 
fee the Image m a Right Line, or at equal! Angles,but ahdz. I kiiownot, 
whether this Experiment may not be extended fo, as you might fee the 
image $ and not the Glaffe •, Which for Beauty and Strangeneffe, were a 
fine Proofc : For then you lliould fee the Image like a Spirit in the Aire. 
As for Example, If there be a. C eft erne ox Poole of water± you fhall place 
oueragainft it a Pitlareoi the Dentil , or what you will, fo as you doe not 
fee the 'water. Then put a Looking-Glaffe in the Water: Now if you can 
fee the Demis Picture afide, not feeing the water, it will lookelikeaZ)*- 
uiH indeed. They hauc an old Talc in Oxford , that Friar Bacon walked 
betweene two 6 teeples: Which was thought to be done by Glaffes, when 
he walked vpon the Ground. 
76% 
A 
Weighty Body put into Motion, ismoreeafily iriipelled, than at firft 
when it Refteth. The Can ft is, partly becaufe Motion doth difeufle 
the Torponr of Solid Bodies ,Which befide their Motion of Gravity, haue in 
them a Naturall Appetite, not tomoue at all ^ And partly, becaufe a Body 
that refteth, doth get, by the Reftftauce of the Body vpon which it refteth, 
aftronget Comprejjion of Parts , than it hath of it Selfe: And therefore 
needeth more Force to be put in Motion. For if a Weighty Body be Pen- 
file, and hang but by a Thred, the Percvffton will make an impulfion very 
neere as eafily, as if it were already in Motion . 
A Body Otter.great, or Oner fmall , will not bee throwne fo farreasa 
Body of a Middle Site: S o that (it feemeth) there muft bee a Commenfv- 
ration, or Proportion, betweene the Body Moved, and the Force , to make it 
moue well, f he Caufe is, becaufe to the Impulfion, there is requifite the 
Force of the Body that Moucth, and the Refifiance of the Body that is Mo¬ 
ved: And if the Body be too great, it yeeldeth too little * And if it be tod 
fmall, it refifteth too little. 
It is Common Experience, that no weight will prefle or cut fo ftrong, 
being laidvpona Body, as Falling, or ftrucken from aboue. It maybe 
the Aire hath fome part in furthering the Ptrcvfflon : But the chiefe Cadfe 
Itaketobe^fbr that the Parts of the Body Moved, haue by Impulfion, or 
by the Motion of Gravity continued, a Compreffion in them, as well down¬ 
wards, as they haue when they are throwne, or Shot thorow the Aire, 
R 3 ..... . . fprwardsj 
Experiments 
in Conforc, 
touching Im- 
pulfian an &Pcr- 
suffian. 
1 6 Z 
764 
I I 
j6% 
/ 
