Milford chronicle., 1892-02-19


:. .... :. one single scientific problen :. :.
mn which more than another ptops -
nnear to get mixed that pIople'n &
me Standard time, Local ulno' oo :
;n,e ;.ae sre exceedingly difficult problems
- ....s t,,a nnblic to puzzle over, ana wnen
: =, ss<.,e.i time enters the calculation tne
~ - /. hopeless indeed ! have il
....,,+ly ~ late seen SO many letters "a,
aa.ssaed this and. other Journals, an
t<e,s.<,h;ns upon one or the other OF tnseSse I
questions, that nave con
si,,ded : abort note explaining the mann
s,,,,,ts of difference would be, 81 any +
- timely. II it only suggests 70 tns
vouna men in the basiness olace1 sn
Ides Of going to work at = M, ,o'.'.
mean time, and leaving on prompsiy a
Z = m. Pacific standard time the ques
tson win have been shown 70 pos
.s~.c4;cal -, Ode. Tho application OF !"
howeyer. Is purely matter OF eas1e.
=, mall Ia come to time, the great cnro-
.,o,neter and regulator in chief to tne
L.,s;noss social and scientific world Ii the
- os,-t ~ itself Turning upon its AXIS IN the
.,,4riod which we divide into twenty-ionl
onrs. the sun appears to cross tne me
a;ar of each place on the gloDe once IN
- interval The moment at which II
(ses the meriaian of any place (Tleen-
~ for example. is termed ,ioca ~
Il uoon'~,i at that place ms "oaia
lvery}well if the earth and sun re-
- &ed in their relative poslnons'
rZlsn4 earth, completing, as it does, an
5mk I,al revolution about the sun, dld SO
rn;for1nly- in-a~perfecf circle and tna'
s;-cla, we're in the same plane with tne
,notion of daily rotation Then the sue
.ess;ve intervals between the mer1dlan
,,essapes of the sun at Greenwich "ouio
ri he equal, and perfect chronome.er
set at l2 hrs, min., Sec wnen ~
ann transited today would inolcs"e pc
cisely the same instant ior app''' '-''
noon" at every date.
MOTIONS OF THE EARTH
Rnt the earth's path around the sun Is
not a nerfect circle; it is an elllpse' ano
the M motiorriw one portion of the eiiipse IS
.noro ranid than in another, ana this
oorses a slight variation in the Intervals
between the solar passages Again lne
n,ane Of the earth's path around the sun
r. the elliptic, is inclined s5ls degs, 10
The nlane of the equator IN whlch tne
daily rotation takes place. ana coli'e, :,
ouently twice year the intervals -
.,apparent noon" are each ABOUT twepl,
eeconds greater and twice a year apou'
t,vs,,tv seconds less than twenty-foui
honrs' To explain just why this results
could reouire more of an lnvesuSaIoh
INTO astronomical principles than IS her'
CONTEMPLATED; but it is SO, nevertheless
onI anv text book will elucidate the rea
.o,,s a combination of the two'eHect
consea the sun to be apparently sioV
Fourteen minutes in February and ias
e;rteen minutes in November. But II
ne course Of q year the average come
out all right, and therefore a meal m
solar Day" of exactly twenty-tour noul
: ia adobted in the alnanacs and useos ~ y
aJl16nrposes, This accounts for the oil
~ .ce between mean time and sun time
4 regulator keeps the former; q sun Ola
: : indicates the latter.
few wears ago Tor priorto l6o4) ever
y l.rre city in the United States bad II
q own local time, and this was for eac
q s,ioca tbe true mean solar time, obtalne
:, as above indicated.
q REGULATING TIME
IT f>orsaonently. a man travelling wes
is srd from washington would find h
watch fast, as follows: at Cmcaso,
70 minutes at Omaha, hour ~ minute
70 4 Denver, horr 80 minutes; al ga
. .ake CITY. 2 hours 20 minutes, and una
g i. At San Francisco, 3 hours 2mlnute
3 Il viii readily be recalled how mue
~ annoyance was occasioneds by all the
q var;ona corrections, both to tralnmt
y .,,tl travellers. About the year me
" toned great reform was mausuI'''e
Nowadays traveller going westwal
f;nds his watch fast from time to TIM
r int omIv the hour hand is in error.
Or ~ clocks in the country indicate t
r. minute and second Of Greenwich me-
3 dime. but the hour Il changed Tor ea
y l6 deus. Of longitude. Washington III
he 4 hours slow Of Greenwich; Chicae
- hours: Denver, 2 hours. In San FRA
- cisr,o we are = hours slow OF the pm
81 meridian. All the intermediate clt
9, ~: towns are run on one system or a
~ nfhar. according to their location
n lrr0jtude. the standards being eastel
~ rerf,nl mountain and Pacific time
~ - Hna piecee on the coast are SCI
Psoaftc staAdard time, which is ho'
- s,fzrcv of (3reeuwich mean time The
Il. eofs, I watch which y see At oan rr,
s. 6 ciaco solar time by means OF correct
~ ~ dill 4 sill minutes ~ secor
aE SIuw q Pacific standard time clo'
ssa ssnse We are that much IN lonyitr
~ ,af the 1zpth snerf9ans which tor
Z EASTERN boundary d northeFn u
NJ 4 3ornin and on which only Is tho "Pac
4zrhsr ooincideut with local mean tim
ll IL nan Francisco Examiner.