New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1851-08-22

The Convention Is filling up rapidly.
Among the new arrivals TO-DAY are Prof Caswel Of
Brown University Prot. Haldcman of Pennsylvania,
Drs John and John l.. lie Conio OF New ORR, DR..
lie Con,e of Georgia, Rev. Theodore Parker OF BoS-
ton, James ID. Dana, Esq. of New-iaven, Seba
smith Esq. Of Now.Nork, Prof Horsford OF am
br,dre Prof Bailey OF West Point, and Prof o. Al.
Mitchell OF Cincinnati
The papers read at the morning session to-day
were OF unusual interest transmit abstracts OF
several of them
Another and more extended communication than
that OF YESTERDAY, ON the Solar Eclipse of July IS
was presented by Lieut.. CnA> H. DAVIS OF Cam
bridge IL was as follows
THE SOLAR ECLIPSE o. JULY 2s ISL.
Lieut. DAVIS reminded the Association OF a com
munlcallon made hy hlm, al the meeting al New
Haven, concerning The solar Eclipse OF July = of
this wear. when he spoke OF Is value IN determn-
ING the moons Stm-aameIeg and OF the tables used
the Office Of the N@utCa! Almanac Tor determining
the moons pace.
These tables. II must he remembered. We're new,
aud never before used for IA ephemeri> They were
intended oy Any, IN their oreinal form, as gwen ~
the volume ~ lunar reductions 10 be an exact tN-
preston OF Plans'S theory, but had never been emu
poyed IN practical applications Ia these were
added under tie lmint a.atC direction oI Professor
Per,c, tables embodyng Sten>en> ionG Inequalities,
and Alry'S corrections oi The elements OF the lunar
orbit and OF some OF The prnclpd Inequalities which
he had derived nom his discussion 0t the whole
mes OF the Greenwich oOSeO daonS, together with
some new terms ~ which this discussion led hum,
the existence VI Which had never been before SUS
pco,cd, although S;anScns subsequent nv eSheaon>
nave confirmed The results 'nu> seacaedSN an empl-
neal process.
I;woul0 have been very extraordinary u tables
thus obtained had lot proved superior 10 Brick
hardtS old tables, which are >tlli USED IN all The
European FNhemerldeS ami the observations OF the
present Eclipse IN this cogatry have >,ylAlngy eN-
emphhed tins superiority
The cine, diaes,nce IN the results given by the
two tables i m longitude The other differences are
les remarkable. ana mdeed OF slight importance.
The difference IN longitude amounts e. eighteen
secouOs of arc IN the case 81 The Eclipse. and The
difference IN time iortA0 phases ~ The Eclipse MAS
for the beginning rather more THAN minute, md Tor
the end about w o.thrds OF 4 minute and the whole
OF lhls great difference i N favor OF The new tables,
as y shown oy all the observations without single
r, illustrate this point. ltcui. DAVIS cited the be
ylnnlng OF the Eclipse for 'mordse.
On the very cav OF the Eclipse. he received from
Mr. Mlers Usher l1ng>iTCih, oi FANddClphla
formula containing corrections ol twelve other me
cuah,lcs with a statement that he mad examined
the remaining inequalities. and found that iaeY re-
CURED no correction IhsSe vo'lSSs,0is, m. -
The method hy which these corrections We're 90
tanned. what they thc;T eteci upon tae 'Heossu
cal computations, VIII PROBABLY oe coamuhioMsU !"
the Association before II adlouTn>. | may say nov.
ever continued Lieut. DAVIS, that there VAS no oouo'
entertained from the way IN which they were com
pu,,d, that they would BE- All improvement though
the admirable agreement that followed could never
have been looked tor
Mr. Davis here introduced the observations, and
compared them, making comments on the results
and concluded With expressions OF the strongest adj
mus,ion for the sagscl,y and invention which had
led Mr. LongSiTeth 20 his improvements OF the for
snula OF the longitude. by means OF which We were
now better axle 70 predc, ne noonS place here than
M any part OF the world.
A communication en- The Permeabll,y Of Metals