C7] 
and a change of its place, but the two theufaiidth part of the 
Radius of this Globcy were fufficient to bury tlie Tops of the 
higheft Hills under water. 
Thirdly y That in all parts of tht Surface of the Earth, or 
rather in all Points equidiftant from its C enter , the force of 
Gravity IS nearly equal; fb that the length oilho Pendukm 
Vihv^tmg feconds of time, is found in all parts of the World to 
be very near the fame. 'Tis true at S. Helena in the Latitude 
of 1 6 Degrees &>/f //7, Ifouadth^tthQ Pendulum of my Clock 
which vibrated fecondsj needed to be made fliorter than it 
had been in Englandhy a very fenfible (pace, ( but which st 
that time I neglected to obferve accurately ) before it would 
keep time ; and fince the like Obftrvations has been made 
hythQ French ObferversnQ^rtht Equinoctial: Yet I dare not 
affirni that in mine it proceeded from any other Caufe, than 
the great height of my place of Obfervation above the Sur- 
face of the Sea^ whereby the Gravity being diminifhed , the 
length of the Pendulum vibrating feconds^ is proportionably 
fhortned. 
Fourthly y That Gr^i;/>^ does equally affed all Bodies, with- 
out regard either to their matter, bulk, or fgure ; fb that the 
Impediment of the Medium being removed, the moft com- 
paft and moft loofe, the greateftand fmaleft Bodies woxAA 
defcend the fame ffaces in equal times ; the truth whereof 
will appear from the Experiment I beford cited. In thcfe 
two laft particulars, isfliewn the great difference between 
Gravity ^nAMagnetifmyXhQ one ^Sedimg and that 
towards its Poles, the oth^r all Bodies alike in every part. As 
2l Corollary \ from hence it will follow, that there is no fuch 
thing 3.spoftive levity , thofe things that appear light, being 
only comparatively fb ; and whereas feveral things rife and 
fwim in puidsy his becaufe bulk for bulk, they are not fo 
heavy as thoi^Q fluids ; nor is there any reafbn why Corky for 
inftance, fhould be :^id to be light becaufe it fwims on Wa- 
ter, any more than Iron becaufe it fwims on Mercury. 
Fifthly^ That this power encreafes as you defcend, and 
de- 
