£From the National I tellig(’ nce} •! 
Cincinnati, Dec. 9th. IBIS. 
Messrs. Editors —I read, to-day, a par¬ 
agraph in your paper, wherein a doubt is 
expressed whether my idea oi hollow con¬ 
centric planetary spheres be not adopted 
from Dr. HalieyV* expression of a simi- 
i lar idea (saving that he did not suggest 
| the polar openings nor any facts in proof 
of his position,) in reply to which para 
! graph, I declare upon my honor, that I 
! trad never read nor heard 01 Doctor Ha 1 - 
: ley’s idea of hollow concentric spheres,' 
| or anyotner similar idea of any person 
whatever, eilher as relates to the earth oi 
the other planets, until several months 
after I published ray circular of April 
10th, 1818, and my second and third num¬ 
bers; my pursuits and situation, for several 
years preceding, afforded very little op¬ 
portunity of reading; but in bed, on the 
road, and at my work, I reasoned closely, 
(as has been my habit through life) and a 
chain of connected links, oftentimes add¬ 
ed to, as my daily records show, led me 
to decide (in the face of all the authors I 
ever heard of) on what I have with confi¬ 
dence declared to the world which, in 
my Second Memoir I prove by mathema¬ 
tical demonstration; and in my Third, 1 
show it is proved by ocular demonstration,, 
at least as far as relates to cert-in foreign 
planets, particularly Saturn and Mars. 
JNO. CLEVES SYMMES. 
* By the following extract it appears, that 
Kepler and not Halky was the first surmise? of 
concentric “ crusts 
“ Kepler . and after him Dr. JfaHey, suppose 
that our earth may be composed ot several 
crusts or shells, one within another, and con- ( 
centric to each other.” 
Hees's Cyclop . j&rt, Ring. 
