New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1850-03-14
gnetism Applied TO Astronomy
Prof. MitchelI's Lecture.

Prot MITCHELL ON Tuesday evening delivered
the Second Lecture of his Course ia the Broadway
Tabernacle upon the Applications OF Electro Mag
netism TO Astronomical Science. We were glad
to see a large aud very select audience, who test
fed hearty and ready appreciation OF tue beaut'
ia he1ues ana experiments prosecuted with such emneh'
success by he distinR uished speaker
Prot NJ commenced his remarks by saying That note
had been len upon bis desk requesting repetition Of the
discovery by Mr Ktkwood he compiled with the re-
quest The discovery made ty Mr. kukwood he observed
moi one which any degree nteTeres with the great law
Of New,ouian grayauos ss fact existing IN The physl
cal constitution OF The Heavens and being fact we rest
upon It as upon solid basis Of rock, and ~ork upward
ts.,ca IN lie investigation of the causes which produce
hose fscs Prof NJ proceeded explain the meaning of
the proposition put forward by Mr. hfkwood suhsinn-
TALLY Ia The same manner as in his former Lecture
Leaving this subject he proceeded to consider the topic
OF the evening; m entirely different department OF As
Economical Science Lecturers he said are generally ex'
pected only 10 give the results obtained by Investigations
made inside the Observatory He believed 1t had rsrelyor
never been attempted take the audience inside and IN
fold the manner OF those cations but discoveries
have recently made and results attained which seemed
10 possess 90 mush universal Interest and promise 50
much for The future be had before been npeed
TO come before promiscuous audience and would no"
eudesvor 10 repeat here We aware OF the won
drcus changes Already WfouRM oy Nt lhuuuuSNuh u inc
Magnetic Telegraph BY 10. sigt4s are sent commnnica
unns are spHlches are received IL seems that
Que and space auuhiH ted-a n the widely separated
cOafues OF country instantly brought INTO NE same
po.ton The same has been brDusti into the ser
VICE Of The Astronomer assist him ~ determining his oh
improvements which have been made The respect be
comes necessary consider for moment the machines
hitherto cup owed in Astronomical observations. The
hrs oues,op % be proposed H. What dc you mean 10y
observations In erng this Prot NJ went over me
ground mastery hand " ssd he the hearer would
70 An him info the Observatory. and with him commence
toe examination the wonders there eNh hited n he We're
to Ahe him nom star 70 star tfom system 10 system from
nebus 10 nrhuls-unrl they had swept out of the greatest
KNIT Of spare capable OF being reached by me insumenl-
ofhe planets should net have made any observation
The - what technically wo0ld be called gang nos
Deserving II i pnseineuL iu one sense ssirunom
irsl ohse9snon : mai ~ which IL sscertaned, al
possible accuracy the actual position 81 TIE heavenly 90
dies and heir respective distances Here The Professor
illustrated in n crar and eirscuve msnner lie relations OF
the and the fixed stars and The importance of ne Yer
ns Equinox Tor the purposes Q, the AsuVnomef ane az
Tie rrmsry meridian from which our Other MERIDIAN, are
deserved and eompo,et As on me cara n As0 So
Of south Of The plsne Of the ecrpac dsnns as zoe
demonstrate how his manner, the actual position OF
auv planet IN the heavens IL accurately ascermned ana
sxusrs5 hs diaeronce between slderesl and ordinary
nneihe former being used altogether r tue purposes OF
he um.syst,i The scton OF the Transi, copee.p
asf'sweb within which marks palpsble meridian wheFe
fon tho calculates his measurement down y wv
sso.es OF sesono ~ us seee TWO wires sepsrsed
Nv an nSerss such a. 20 require lime FOR
pass from To the other which would be about
the. secoads OF space Rat what three seconds 81
sscef may De ssied Tits was illustrates ~ The sun.
diameter which the Professor computed 10y hesusuoh a.
1900 seconds Of space Take out three OF heso snds N
your mind and you have an idea OF her eNtent ~
Den there De errOT In the ooservsuOh eshses ~ e.
ure error IN tho result amounting 10 seconds cur o. NV
o the sums body Hence these errors are TgS and
woah involve very positive 'os' OF ue usheei o.
lsrge number Of the planets
Frof NJ teen TUNED TO the method by which the deeins
Rom n aeteTmed lie made honorable uiauuon ol The i'm
made the Instruments
aesertnsng the two elements Of Asironomio-. Science
witch be hsd thus brouge, forward With those
observation under the old condensed into
daerences u long ude between different points he u
mAsed thai hsd Formerly been great object of research
mechanical appliance to mara The precise
iusl.pt At which distinct meridian
he sane instant intimate the TACT 10 III ASSISTANT
-. snoshry wen, sueeossed hseI via some mode
Whereby ihe assistant IN smother Observatory might
o. ssasn 10 wash 5.,,1 s yves he encs Of L asi1uae
between the sisiious TIE question here thei WAS
sS 70 overcome r 'sS The PTes.soT oSsrSed hat
his sienuOn had been called 70 ihis soet yea Nno
a hxH 1gO IN connection with Mr. Sears Walker,
reDteusn oi errs scientific Sltsnmeas attached 10 the
Coast Survey servicewho was ihen IN CneinnSn aoOer
ofssr, 10 iosn Prof IN determining he difference Of
kpsitu3e between Cincinnati and Philadelphia Through
ne Kindness O. the gentleman who hAs oeen ~ lnse
aso's "a Is. ss,s wS., PTf M,chsl was es-
&be 70 open Instantaneous connection between tne %
.srvsoy aud TOE cay Of CnennA- v see VI Ses@ SS
Tue Iiuioo phlladephis Of these con given
Might ssd he Professcs we seeofainsy ssseo,ea ~ e
Observatory al Cincinnati, aud commenced e.eSfs
sonnnsacsion with Philadelphia II msy Be readily con
eessed with what insores, gathered sroand me tsee 70
wfaess The event The experiment was crowred WIZ
rosplofe sccess seven observations made W fhilsde
p6s sszed the instant and recorded in ens1,
aan ItwaS ssid Inc Professor II The operators had
been tosethef In Tho rooul
Bat diiscalIy now renamed thai Of being sn com
PEELED use two different Coeks Coz recording The ooseF
v4ions thus simultaneously made TIE question nov WA
whether II were possible overcome this in1peclmetr
Ard The identical Clock do the work Of both
Prof Mchcfs stenton Was called 10 this BY Mr.. Walker
On The evening OF the h Nov lS&S Before hr sept ths
night be had Clock actually work TecordiRg ~ ee1ts
and or The sSilosins day be succeeded IN accomplishing
sea solution OF ,hs mechanical problem IN such snner
nat be hss never found alter spc9 This
snnoareemeui called forth cod and continued plsadits
iron TIE audience The Dventou thus Simply and expe
dlnoQsly esred constant The sgh OF