Opticks 1717 - Up

I 3PT J
&A 21:. IS l.YOthis b’kdium lm~h rarer with-.
I,rl the dClYff2 Bodies of the Sun, %a~, EQnets
atld Co1lletS, than in the crnyty celcitial Spaces
bet\;rwn t11e111 ? hid .in pafling from them to
great dii.tmccs, dot-11 it not gl’oW denfir aniJ
denikr pc’rpotunll.y, and thereby cauk the g-a-.
vity of thd‘c great Isodies towards one another,
and of their parts toWards the Bodies; every
paod endC~Ivour.illg t0 go from the deni-w parts
of t ry x .~ed,itr~n towards the rarer ? For if this
Medium be rar”kr within the Sun’s Body than at
i.ts Su I-fKC! , and rarer there than at the hup
dredth pl+t Of ill1 IllCh f?Olll its Body, and rarer
thcrc th~l at the fiftieth part of ankh from
its Body, and rarer there than at the Orb of
Jh2~LY’H ; J fee no reafon why the Increafe of
dcniity kould &q> any where, and not rather
be continuLYti through all diltances horn the Sun
to S~iW2, and beyond. And though this Increafe
of dcnGty m$ at great diftances be exccedirlg
11ow , y ct it the clailick fo?ce of this;
.Mcdium be cxcceding great, it may M&e to
impel Bodies from the dcnfer parts of the Medium
tovmds the rarer, with all that p0Wer
wllicl~ WC call Gravity, And that the elaitick
force of this Medium is exceeding peat ;’ Ill&y
be gathcr’d from the fwiftnek of its Vibmtions.
SOC[& T.IXX~C &Xlt .Xx40 hy$i$J Feet ill a k-
co~,~d Minute of’ T’ime 9 and in i‘even or eight
Minutes of’,I’itne they move about one hundred
EzqliJh Miles. Light moves fro111 the Sun tO
iis ‘ill about: fevcn & eight Minutes of The,
which diikmcc is about 7ooooooo Eytg@/b Miles,
fuppofi~~g ohs horizontal P+rylax of the %.m r@
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