The midland journal. (Rising Sun, Md.) 1885-1947, 1912-12-13
HEuN|ERRlNG sun
lis Uncle Sans Most Reliable
Lighthouse Keeper.
NEVER FALTERs IN ITS WORK.


~ she A'o p sne Wo.'os'.u' ~" ! 80.
y k'ente sne Acesyiene 1eacons as -
Bats 81 Night and Exsinguishes Them
AZ II Rises n the Morning.
M. ) ~. .,,,s4 +r,,st,,o,.tt,7 oe
,...s !. 80 .'A m. 80 s,,,, q. ths
., ,a S,as $500 1870 go s 49,. -
-. s. 80. 1900 s,,s -
.,s'.ss ss sa. ac,,., 80, s,,a ~
49,, $500 .,~
s.S. ps.sI-s'..,-y ,.,,s go ~,
u.s. 80 =, 8, h 49,. 80 hsn ~.
$500 80 q Z. 8 arot,,a- TING
n U.s .s y'l ~ Fl. Tg.s y - Statas ar
Wy = 49, 80 ~. 1870 $3.50 go Z,
s.,.s, - = $500 ~ ~ ~, ,,S
s $3.50 49, 80 s p, 49,. - -, aa s,.- -.
1870 .Aes p ..... 80 8. 1870
y. ..I's1 u''ssA .'''s =. $50 Z
an ~ 80. .,es I. 100000 -. -.
no =. aSsy $50 ~. 80 80
sns nls. s.sp = 81. 800 40 = sss,
49, = - 1870 49, 81. q. . 49,
y.aees 1900 Aa - ~, was s -.y ~, ~ :
- .euo ni1s sns 49, ~. = =. -
psca.lon = csI.ain 80 1872 q. $3.50 ,.-sa.
s,nc plinc,pies tne ,lsn.lns =. Tue $3.50
ca.a,ns u osshcons lna ... $3.50 ~ sos.s.s
- tns IVY ssas anu ele ~ a..u = =.
~ $500 4, 80 anu $500 s s.saI Z
ssleam 81 oas nuse counsAs SV'Aau -
Aa1 ~ s,l 'llns 80 8.
So vl..sa osatss 49, u. 49,. 1s1On 49, ~
.sle1.s'u ~ ens acety .eue .asrs a-au =,
u.oma.lcally ssn nnc 80 puoy III.
=. saae ga Aoou a..N u.N A.vs :
unal .Sos Asn ..s ,s s..s.sees =
hsii.iouse poalu usslseu 49,
WVnu!ul 'lnplose'nen.S' aluols sneln
me ulillzat.on - ent sun.
me 81, ilsn.ins anu sell s41lns .' u,sn,
ing acesylene peacon = very s.,nple
snlng, put y uepenqs a,nost e.l.al -
on sIie sun wave, Wlcn y ono = 'ne
a,lyse Wollussri :. pue east So.sA =
tne acnlevements 81 1houern science.
" tne nrst place. tne source q nsn.
kor these lone Deacons Y lissoivec
acetyiene, Wnlcn = stored under pres
sure n steel cyiinueEs. Ohe n ehesse
cylinders can pe charged VAIN enough
gas 70 last small beacon three years
usuany, however, u Ine ease q noas.
ing Duoys. SIX months supply y al
that y necessary. as sucn Duoys are
0yernauIed ana painted twice year
knowing the size OF the name ana lts
hourly consumption OF gas. 4 - very
easy to compute now long cynnder1ui
VIII last and how often It VIII need to
be visited That y all the care the
light VIII need. The sun yaiYe does
the rest
The scientific principle upon which
the sun valve depends is that light
waves become transformed In different
degrees. according to the nature Of the
intercepting body. Sunlight upon dark
surfaces Is converted into heat. and
heat produces expansion. This expan-
sion IL especially perceptible IN certain
metals.
In carefully sealed and substantial
" mounted glass jar nearly a foot
high and about one-fourth that In di-
ameter thick black rod is PLACED per-
pendicularIy through the center. It is
supported BY three slenderer rods Of
highly polished copper. The big black
rod Is Of copper also and is coated with
lampbiack to make it absorb light to-
5 the greatest possible degree The sup.
porting rods reflect light without alb;
aSprbing 1t and do not expand or con
liact to the same extent as the largest
rod.
The thick black piece OF copper in
the center Of the jar Is extremely SEN
sitiye to light and heat. AS the Sun
appears and. the atmosphere grows
warmer In the morning this rod length
ems. 1t pushes down into the metal
chamber in which the glass jar rests
and touches the end Of Q lever. It
presses down on this lever. which Is
controlled by spring and cuts on the