New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1849-08-24
CAxslrpeE. Tue,aar. Aug. Z

bAnskiDSE- tuesday, Aug q
I In the general meeting This morning. the Con
venaon began 20 show symptom, Of decline In the
adoption Of sandry resolutions Of thanks to The PRES.
dent and Secretary the Corporation Of Harvard Uni
versiiy and the ladies and gentlemen Of Csmord.e ior
the accommodations Afforded
The following gentlemen were appointed tie
Loeai C0Muit for the meeting Of August next At New
Haven
Rev Dr. T woo.,.y Prof D O'ns;ea. Prof y. Por-
Ter VIM. Hilhous~, Esq. d Dams, A skinner; Or
John Kng tt, Z. L. sai.oury E-q and B. 5lmaa, Jf.
The Shading Committee reported 10 favor Of
the appointment Of the following gentlemen as Com
mtteo to memorable the legislature Of Peunsyl
10 reference t. ne publication Of the hnal Googea
Report Of that State
Pre.ideni Hitchcock. " c Red6sd. r.a. Solomon ".
Roberts ESQ. Prof D Baehe and Pro, James Hal
TIE Coar S1rrey.-The selec, Committee Of
the Association % whom was referred tho commuuca
ton Of Prof 4. D. BAcHE relative to The history. pro-
gress snd present condition q the :. Coast Survey
reported this morning through their Chairman Pres
dent EvERyrT. in high commentator Of the objects
and purposes Of undertaking -concludng With ~
following resolution
Hcs0g,3 A. the sense 20 ibe Americas Association Tor
the Advancement Of Science thai the manner which he
Coast Survey Of the United States ha been conducted by
Prof D. Bacne ana those assocated with im. - h-hy
crediisbe 20 American seience-i!st % promise. great
benefit To the Commerce and Nav CATION Of ne country
and eminenuy entitled 10 the continued favor OF Con
gees
This resolution was unanimously adopted, and
the Report accepted and ordered to Be printed
Scientific Educahon.-A resolution moved BY
DR.. D BRErD Of New York was reported by the stand
ing Comuaii,oe providing for TIE preparation Of a
Circular letter, by a suitable Committee, tor the pur
pose Of awakening attention 70 the need Of an improved
system Of Education in primary branches Of Scientific
knowlcdse -Tho propo'al elected much debati, ard
finally laid upon the table, % be taken up a. a
future meeting.
The general meeting then adjourned TIL alter
noon the different Sections neanwbs meeting IN their
respective apartments.
In the department Of General Ptysics, there
have been number, of mmunics;ons on subjects q
quite general interest OF these OF the most prom
inent in the mathematical line, that upon
The Relation befroea ne Elastic Cure md me
Motion n M P,ndsiun BY Prot. BENZ. PEmcE.-
After some preliminary remarks Prof Perce in thi.
communication called attention 10 toe similarity be-
tween the problems o. the elastic and the pen
dulum The external sensible phenomens ho said,
are very dissimnsr but intellectually they are the
same and the same principle Is applicable the sou
ton Of each The elastic curve is hst formed by
elastic rod bent from It's direction The tendency Of
the rcd to restore itself Is proporoncd 10 the amount
By which 10 Il bent from straight line. The square ~
the velocity Of the pendulum, when starting from
state Of rest is prog0r0ned % the space through
which 1t falls Prot P developed the equations de-
rived from these principles, and showed them 70 be
identical The same formula are applicable 20 the 90
luton OF the two problems, although different iesgns
lions must be given IN the two csses 20 the letters n
volved In the formula. Those d,noting. 10 the prob
lem Of the elastic curve, the angular deviation
from the primitive direction Of the straight rod the sc
tusl removal from the primitive position. and the
length Of the rod are. In the Of the pendulum
respectively the singular deviation from the statica
position. the velocity and the time The Intellectual
phenomena precisely the same In both problems,
but have a difference OF material form corresponding
10 this difference of notation
The details of the external phenomena 81 the elastic
curve and the pendulum, continued Prof Peirce are
perfect cOunterparts OF each other In all their peculiar
ties The pendulum cannot be- made to vibrate IN lees
than a given time however small the arc throu which
IL passes But we may make the elastic curve As shof
please and what resrnhlancei there 70 be nund
In the two Gases 10 10 that the rod may be ~
short please but IL will not be bent into the ess
tic curve With given force unless II suipasse' or
tain given length
According to the greater velocity given to It, the pen
dulum moves from state Of rest vibrating In greater
arc til length 1t may be started rapidly A. % turn
completely over Ia which the motion will always
continue in the direction. In the same way the
elastic curve may bend bsck and forth IN tortuous
course by great increase OF force II would psss
and round without any point OF htAuir
But whereas the motion of the pendulum 10 perfectly
OnOtonous the variety ia the forms OF the elasuc
curve curious and interesting The straight line the
circle and form similar 10 the ngure o. are different
examples of the elastic curve and Intermediate be
tween these simple other forms singular in
their grace and apparent comperity
Prot PIERCE continued for little time longer IN
remarks illustrated by various disgrams-snd was fol-
lowed by expressions OF admiration from ffoir JOHN
son and CAswRIL, and others
Another interesting communication, presents
In Ne Section of General Physics, was on
The Moisture. Ammonia and Organic Matters of
tAe A'pospA1es By Prof Z. n HoEsroRD.-The obser.
vstions recorded OF the moisture by Prof II. com.
nenced on the last day Of February and were contnu
ell until the 9Th of April-snd thence occasionally.
down to the 10Th Of July. They accompanied by
notes the barometer ths temperature and the drec-
ton and force Of the wind Among the results obtained
were the following as briefly given by Prot Horsio q
That, other things being equal the moisture IS in
general proportion o the temperature that snt Va
raons Of temperature are not accompanied by CORES
ponding variations IN the quantity Of mOsture-snr
that great varsions 10 the quantity Of moisture msy
take place while the temperature ana altitude OF me
Inercura column remain constant The quantity OF
the moisture has doubled IN the course II an
hour. although the temperature became reduced. in
general again, the moisture on ne same day seems
10 depend chiefly the direction OF the wind
The least quantity Of moisture WAS observed during
an W or \ n W wind the largest. during a F, w.
or w. wind. The former occurred on the l-fn
of March and the latter the 2Jd OF June lat The
quantity on the latter day remarked The Frviessof
was 70 that on the former more than tiny % one.
80 The perrneahiiity of atmospheric air % sqaerus
vapor was made a SUI ect of experiment, and the OBJ
.ervsuons extended through period 0f several months
II has aso been observed that the arisias through y
lax ~sgoysa ~ t-rfi1. take, place more promptly M
very bot than IN cooler weather.
The quantity Of Ammonia Ia the air Was determined
by an apparatus OF Prot Horsiord. own construction
through which known volume VI air VAS transmitted
Several determination, having been made twas ssce-
tanned that the quantities nj Amm0uia 10 the car rifd
varied considerably from each other and such va
he discrepancy oi the Professors results that BE- o
bore sisisrnent Of ne quantities sscertNnedoniy o.
ar 70 remark that they very greatly exceed those
obtained by Frcseuus biz recent determinations a.
Wes5aden
This communication gave rse % an Animated
discussion. wherein Pro's Henry, CsswsA, Horsiord
Hare and others participated All expressed much IL
terest and qualification n the results 80 determined
Medical Gc,iogy A brief communication with
this curious title WAS presented in the Geological sec
ton Of the Convention this morning BY DR.. JAox'oS,
from TIE author. l. A. LAFHAx. Esq. OF Milwaukee
TIE beet has previously been brought before the
public BY Dr. Jackson and : undoubtedly OF ach m
portsnce. Mr. Ls2ham observes that the suggestion OF
Dr. Jackson ihsi there is greater amount Of Cholera
in districts than In those based on granite
snd other primary rocks, has received melancholy
proof and confirmation 81 SNndusky City, Ohio There