^ Jky a, Sp- . 
Reply to D. P’s/st'* 
Cincinnati Head' v it * ^tures. 
onW SHS- 15, 1819. 
mv\l' me t0 a,ls wer i n nart ? av,n .£lasi week 
theory, (whioK 1 P ar t e* e Strictures r> i 
ff M ^ f-m t“e He- 
l' om ‘he National LrfF ubI,8l,,n ff «T protesi 
•°me hurried rem w k. ,,'■® encer > a,ul nuking 
, now conclude to* r. ! "f‘‘ fl P r ® 
j subject. * a evv m °re lines o’ 1 
r»**S SfiK" g“j» ”"“w ° r c. 
n ’te spaJe^fvthfeh i?! ti 6 °i h!® fluids of infi 
'•y’j should I tin I ’ 1 !lnk > the cause of grav- 
ocarly or “g h "' ^ aso ” l ° conclude, pres:. 
proved u l h, 0 ’’ eVel '>' P^of the 
: i-fually dense and/- 16 “ Wer ‘‘ evtr y "''*«« e- 
1 acid med L at h," V £?‘' 1 “? e «*•»«*"■ 
l aulm ’ at the g^en points of pressure 
diereforc e iV t he"ra.-kv U u ,y ti qUiet °t ,om ^ 
I measured and is lound far thanToTe/parU I 
I orce of foe fl T re r”* '° ,he centrifugal ! 
ih ‘ the fluid medium revolving round with I 
the earth, tnan to any other circumstance ; for 
with respect to the rotation of the whole mat- 
I ter ot taiis our sphere, it must be supposed to 
yield and flatten towards the poles, and pro¬ 
ject and accumlate towards the equator, ac- ' 
j cording to the degree of velocity with which 
j it rotates, and yield thereto ; much as a whirl¬ 
ing soap bubble would : hence upon any in¬ 
crease or decrease of rotation, it would vibrate 
until it became settled in that shape which the 
principle of gravitation, and force of rotation, 
would balance it at; therefore the relative 
thickness of the sphere at the equator would 
depend thereon, and the gravity and centrifu¬ 
gal force would alike correspond to each other 
in every change. 
Not knowing how the 347 experiments were 
performe r f cannot deny their correctness, but 
however cc > rect they may have been made, th ay 
must have been founded on the the 'nj of grav¬ 
ity, as received in the schools ; which, like my 
theory, is not yet admitted as an incontestible 
truth. 
As I have notanv where stated that the earth 
| was a single “hollow globe,” but a nest of 
I spheres, Mr. D. P’s third and fourth paragraphs 
' need no other controversion ; if there were not 
a, succession of concentric spheres, I should 
hulk with him, that the sides would have a 
.cadency to colapr.e, especially at t.ie verges 
Perhaps, as it is surmised 
tendency to colapr.e, especially at tne verges : 
Perhaps, as it. is surmised in Hees s Cyclopae¬ 
dia, the ring of Saturn, (whichrotates exceed¬ 
ingly rapid) may be formed on suc.i princjpJe . 
jf this principle I design to ti’ eat " ler at a 
of tins pi 
| future day. 
