, 1881-03-04

the true mrrihMn HING uf tho hnrlzntt. AlktL frr
nxt4"i lin Instrument frnit, Il truly hnrzontnl
r,sltton. Ami for the ctitlisnnt!Nn rrrtIr. which
+ the divergence of tho optical axls Of rho In
srntitt r. ,r,! inc ren' position OF pcrpendfeu'
" In tIH, ,'Itlcn times, before pcople u-eh tho
kt,nws, Us Tic eyo unt % cur n,ctbsnl II counting
tlie seconds OF tho cinck whllr watching tho
movement of tho s,nt. nnott,or correction ,at 70
server. i!,t thls Inst mentioned rrrtr In rcti,ns'l
H. T1ry ts,g,ign' a%1,ty, wrn the rhTn
"ft!H tho nstrs,s,n,.erascertAnsh how much tho
cinck y fast pr sw. Tho c!''sk hcre referred
marks ,ho ap.s ii :sI!. times ii hoiss ,luriR
tho yesir Of :Ni'l 'lys. The stars Rnln u. tho sun
At tho raic of one '!l.y IN ycnr, whrl, Is nuout
11nlnutcs ~ srcnttts per tlny. a cuinpHrsnn L.
then hlac srtwecn this clt'rk mud tho u,ln TINT
r. kerp,nE .itnan:titne. that ts recoriIng tho
k,cx nc" ~ n Viii :" ,!'i,as s, whic y ws @
im supposed To swing bnck nnd furth ncr,~s tho
llnre uf the true sun fur tlI',cs yrnr ut tho
graph. THO sulsrca! lne is thGn converted init,
in'.!.l sulMr TING. and tho tieklnEs os ihn ctck
ksp,nx ts las. ,s sntinns .i, !;re rasfer.S
observatory with tho Cty. ltali. This wire Is put
w. p W The Flrn i'TpArtMlcni ut the cxpensn OF
far hs prp:o. ma 4 ,hosoushiy ", 'I pr"teess 70 e
and snsulMtc.t. nn extnnsc having bcGn spnrcd 10
n,Akn II pertcet. Tho wIre is hung m poles thu
entre Fa't,r, which eStetids fr,in The ubscrtu.
tory, by way ot cnttnse Grave and Prairie nvr.
nsies, M 70 Twcnty-srcnnd street, thonee thrnt!gh
erossnR @ ica sn IL 10 W W%bss fro, sah Wen c,,rs
down iIcKs,m to CMrk. and ls col,trctrd With
tT n S1rG;ricai 'rp;ar"!.s IT. tha Gty-tin
SSsie;yJ wh!sS & eatcd in W Inc >i'tr;r F'r.
afa st 1|tSe t. ck a. sw IL II Hay
Co.. which hns hrcu tnAnc.i hy tbon 10 tic 40
c'ciy pending tho completion of tho cloek now
CunlmMy Of ijostnn., TITO operator in tho uIIivo
af tho fire Alhrm Telegraph nnw sends tho slg-
ntis 'laily 70 thn noltco stations and ct's'nc..
t!'at @ arrangements will soon be mado to sond ut
THIEF T1,tE-s1GSAr.s 4 DAY
ininary nuico aJoat Two ON n,iatrs IT'S IL ai S,,v,eo @
Of cnch tl,ne-recuri. tThs woui,t permit tlIu
time comparison t. bn 1nAdu tu wi tt,stnut ut
Tho rcl",rter WIS nlso Int'r,nGd that The h,tsl-
mss cnnMutlty could ntsn eccnrr tho cUrrpct
Ting. SnnrrnnEeuio1lts hlvc y't hrcu sna,!c f,r
DUNG 10, but r,rsltMbly sor The prnplg r..
mtg. tho t,npnrsutcc or having their clocks
rght ton dot, agsGrsncnts w!ll be entered intu
oces, aMtika. ant, cs,t,tltIi9rounls. Suvcr,,t oI
the railroads snntrrl'lg III ChlcMR0 h,tro r,in fnr
several y"ars p,tst 81, tho titn' furn|ssod By the
tewrcrs have also regulated their chronulnotcrs
sid w'.tcilcS hy this ling.
Thu ttw clock alluded 10 aboro will he II first
cnss tin1Hpfec" III Gvcry respect. II will Keep
the tiinu fur severnl tllys true to Within sue-
oWl, nll ean therefore he relied npnu In case Il
lifenk IN tG wires Or persistent cloudy wrhtller
shu!1lti Interrupt cotnnluneatlohs or Interfere
wit observations.
a.. Another sa!ex,arl IN ease ot accident has
transporting Il c,,r.mo1ctcr letween tho UD.
servtnry md tho City.llAll In e,se Of Interrupt
t!otl uf tclcKraph.s communication, ind tho sys-
ten! Of comparison clicks ut tho Observatory
VII! enIbu tho tiule tn by kcit there true to
within t.,s smallest pArt Of second for period
f. t41bH
THE NEW CLOCK
will he put III the nrw Clty-tlHll whcn II fs rcndy
Tor occupancy md tho Fire Department hus
a.u' moved insn T. THE now eock y nat like Tho
Distinguishing featlrcs Of that tno1iHrel spcel.
met t'f 4rei1itect,lrc,-tho old rt.1lntsc 9. a
..s.. LEVER ,, c.es WIS then used with fnur fuces
cn,mta Of tho nnto.iire structure. Tho now
!n's Itt' Is ns sS,n ,arrgc; for sc eosk, tue
81 ,srcnt "a nlti',ie in our " conp.rs. IMP 4.
lively ,narrow streets,-bcsIdes it would har,,y
ne S ~ kecnnS @ ut w,t sho aMy!ncsnx M character e
~ 1ns 1tcct'snon thing Ut thu pnst In Ii biz city like
GmseaE IT," whtct nssss.es teiesruph aiar w,
nf tho bell, or thu Elyr1t time sgn to nil parts
q thu usty simultaneously. The tire anr,n. nld
the ncw paeo, telegraph .sys.otn. with it's Nito
tan ttkc tho SUR tImc. Tho itrr-,l1artn wiro
emll hrinx tho time signHis frum the little
n,; S to sG uSu T. S o III 5SST ass right
DIFFICULTIES.
There tro numerous u,akcshlfts for obtaining
solr nr STIR time, hut t1,re OF tusn cn. be de-
rc;!tltd ~ tn give Il @Irreetly THE nonn-ilnrs
us It ~ cllllGsI nilf ho Msttl In tho etntry Tlu
rrsiItt nhtHnn t'nm tho uso uf Hll nf these con-
trlvHIsces iH Hnih,rhy several sIcbntls ErDul tho
how t. nke ito n.FyMtot, au.s THAI lie ,,cesss,lry
corrcgttGn 4l1tcrwnrA, c,ln tuku tho Time In this
way ; VIII! III my ~ *atlsfnctoFy degree u nccuracy
struH.cnss .1,d Ill the new appliances. tho wnrk
,,1 .! t@kEnK tGs t.,,a tine anl OF nakus tho re-
r rax conssrsS, asSss Sor I rsny : oxpsrcs ss &C:
Much tf1nu ntid skill nro demanded II, Keeping
thu clncks In unison. With Tie observations III
mud 10 thu mir pressure Tho clcacy Of tns Oh.
tersalnIss requires cltse ut ton to ,tetItts.
s,'ld cn'nplute u,nstrry 0f tho instrument
nru thu TING splrst-lcvul far determining tito er-
rUr uf tho Level. tho arrangements for uatny
c sGc %cb H1 s ss. s1 fur G5nE hS rT
.ilIa tho barometer whlct, must 10 0bycrvett III
order tnsee how much tho ray If light Is bent in
altitude Ut Tho xtnr. In utititIon to ali this Il
nlnsi must 1,stess \ thnrt'tHh ktinwlpt!Ke Ut
mathematics with fta calculus. spherical trsK
oIltmeirr, aud tho mysteries VI atar en>putil-
u1n nnd n.rasnWments.
:. Prns. q. ". HnttKh. tho present Director of tho
ence IL. tnkinK tlna observations, and Mlttiur-
stunts his business Thoroughly.
\ WnlEt NlllE.
Now do not think that tho lttlo transit tee-
scnpn vtn Iu nothtnK etsu bur ,,lIta lhu t,uo t,r
tlMy i'll tl!o wny uUr gullrtBr hNs uGtsgrfNkpu to
tell y,'ti ,lbout an statnI by tlu astronomer Ia
l'rscels!,4 l,HraErnph, i n 1!to as nsrfnl u!
--stl tho ,l'scrvHtnry prs,per. Sum- yours aYa
INC transit WIS tisel nKht utter night by rrot.
ss1.nnwn"t!,.r sd, ,o,, perM't!,ns-r 5sylsx !s
l,u employed IN sitn{ar work ngnin III SOM rs
tho Increased lnrunO Of tho Asiru.nn,lcal So
eiSty VIII permit tho Director 10 RESUME tho