New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1850-08-30


end made some obs rv1 ions upon TIE che nifai ana
mechanical effeots of Eetsr on the fsgm sottry 70
snlts The Esll Lakes a the present uns' hesfi'
ara hodie, Of vs'er with no outlet bat BY eyApo'a
ijop. The Professor also traced ahke; relaaon os-
tween the dryness Of the atmosphere and toe sain-
ity Of the waieTt
srEREOTYPING CATALOGUES.
The plsn Of Prof C. G JEwETT Of sne 5niths'-
Yisn lBstitut on for the universal stereo ping oi
lie Library Catalogues Of the United States. IS IA
,nrortsr Z discover BY ihe kjndbess Of NJ JsE-
ett was ensbled 20 Tor Esrd you summary oftae
resuj.s ne hiss DRAINED, in advance u their puo
cation else4 here. IRE expense Of tbs new plal
viii be bot tiiug and il must speedily cone ia,O
use The defect hss excited much Interest NJ
Jewett states that upon recent practical appica-
Il, Of THE improve meDt at W ashingt0n, after thr
{, thous aud Impressions Rad been taken from one
oftfe plates the last vas 10 the eye ofs pdnter as
perfect - the first BE urges the sdoPtiol OF tbs
method 90 Of great benefit 10 even an economical
point OF view The want OF complets catalogues
ofour large LibIsres IN printed form, aud Of c)1
yenieut reference, has always been felt as sore
evil ard the freq1enters Of Libraries bsi WITH pleas
ure sny improve ment which c0mmends Itself Like
bis TO sefCus attention.
PROF. MIPcHELs NEW ASTRONOMICAL
METHOD.
The disoussion which ensued upon the istro lac
". ~.
serving Right AfceusiOns and North Polar Dis
tADcea. has created q considerable sensation ia
aceIrfic circles The method OF Prof. Mitchell ID
btRuti al for ito simplicity AID csri2nty oil opera
tiCns, md mas received the highest eac1m'qus OF
ttose well qualified 10 judge. A bsiet oasias Of
bis plan for rving aud recording oy tue use oil
the electro msgnet, etc. was given az tae Cam'
bridge meeting Of the Association; Dat his re-
usrSs 1t this time referred m inly 70 tue oosefVa
ton of North Polar Distances, end tne res'i,s o.
tanned by the OF his new macnlnefy' ne Ia
Instituted comparison between me American Cd
serystioBs and those made az the hoy OOserva-
tory at Greenwich. IL was shown that Ia many
particulars the new method had proved Itself vastly
superior 20 the old-,hat while Greenwich recorded
q single observation. the new method was capable
of attaining tea times the numbsr-a1d that
greater nUmber of observations had been made Ia
one month az Cincinnati thsn were obtained at
Greenwich in a year. Prof PIERCE Of Cambridge
replied at some length, as | have previously lntl-
mated, 70 the confident belief expressed by Prof
Mitchell Of the ultimate general adoption ot the i'm
proved method Prof eirce directing his argument
against the probability Of its soPerseding the Ne.
ridisn Circle He did not deny the value OF the
improvement Of Prof Mitchell, a. the reI1lts OF
careful investis and tie expression Of indi,
yidunl opinion from a learned and distinguished
mathematician, both sides Of this argument possess
peculisr interest We shall look anxiously for the
Report Of the Special Committee appointed FOX its
examination
INSTRUMENT FOR GONI0AETRGCAL PURPOSES.
A paper was read before the PhyscalSectioa by
Mr.. W.P. BLAKE Of Nev.Haven, describing
new instru nent for Measuring the Angle confined
between the optic axes VI Crystals, and Tor Gonlo-
metricsl purPofes- accompanied by some ooserVa-
tons on the angles contained between tue optic
axes Of some American Mcas-Ihe instrument
referred to ia desiCn to ssIst the mlneraogst Ia
III fhs4 al ran
minerals by polarized light and to combine WITH the
instrument all the requisites for meteorological nea-
suremeDts. MIR. Is uses light polarized by rshec-
tion snd uses eye-pieces Of tourmsllne or cacspar,
combined with Lenses by which be is enabled 20 re-
duce the tizs Of the system OF colored rings around
the optic axes Of crystsls-thus enabling the OBJ
server TO measure the inclination Of the optic axes
in their plates OF Micas. table Of tho angles
contained between the optic axes OF several Anne
nc sn Micas-from ntlocaties-was Pressnted,
the angles varying from degrees 10 75l. The In
strument ives exhibited and explained.
TIE USE OF WOOD IN THE CONSTRUCTION OF
BRIDGES AND ROOFS.
Mr.. CHARLES CULMAUE Of Bavaria, made com.
muuicstio in relation to the use of wood in the
construction OF Roofs ana Bridges OF large span in
America. Mr. Culmsun commenced with some re
marks On the peculiar materials used by different
nations in the construction OF their public vQrks.
in Germany, structures of Stone carried toyne
grestest perfection The national skill Of Eagtnd
is display ed in her works OF iron. Ia the United
States, timber will probably be employed TO q
large extent A historical sketch Of Bridge buld-
log in the United States was given by Ar- Cll-
p.auu. He gave bis hearty CJmnendasion % he.
mDgton's plsn ex claiming its principles, aud lain
arlDg that its operation will prove entirely salts
sctOry.
MINOR AFFAIRS OF THE ASSOCIATION.
The Local Committee for the meeting at Cllc.n-
nstl consists # the following gentlemen:
Son. Jacob Burnett Charmsn
PrcfO n Michel, r.. Rev Bishop Purcell
Charles SIets0D, Esq Df JosePa Ray
Hon SiInothy v stkrr JlO II. fOOie, Esq
Prof HOTsu0 n ROblHsor, DR.. A. "Erdsr,
Ruheit Buchsusn Egg Hon Ntbau Guf1fd
Rev DR.. ~ l. Rice, D Mauthel1, Esq
Looai Secretary ThomAs ksiaey.
TIE number Of new members added - the assO.
citation 81 this session is cOee upon Oas hundred;
sud the let embraces large number Of nanes
wel-knovn In the literary AMI scientific circles
Annexed are the names and places OF reIiieucs
# the persons added:
william Hiihouse. New Haven r COPY ND, MSntgony Ah
jas. H. mbul stonngtol, c. Avian Cli'ke Cambridge,
81 y Onsted. Ses Haven, l White, hcs Have,
Chas. K Goadf Oh. DO PrIi JOSIAH W. Gnbs \ Harsn,
G. J. Bruih Yale An teal Lab. Edwsi k,u. abncs
Nm. J. CTaw, Im1hy nst-lL View Haven,
WIN. Bisyer DO As.os wes, Yale inslJt LIB.
Frauk Feuton, CanOr5Ee Mas Or Henry Eni, do
Jufs r. Higard sCos-t Survey Jons B. Bruc-, do
hon Alex. E.srett, EBtu, Nj DR. fho- Web NevHsven,
Dr. \ Foreman " sshn lton. DC X Cumsul. Bisana,
Gardner D. Hscor tes fork Hem n fE-', ll-ann@ swift
Pru J.. y. slisbuy, New Haven, Cha, A. ~, Esua, ono
Pres 1heoc ID. MOohey,do AIR. Miach.h. Afneli, Ny.
Prof Nosh Pair.m, Dc Orange Ju5d. Yale Ana s.. Lab
s. W Juhrso-, lae Anal Lab Lldv xsiltian-r Bn.ol o.
3 Mfst .nra IL ArIIa a