, 1869-06-17
''*;; 5;:e'I - Il: ttEEs : r. sl:.: "a
1Fn 91a & RE "a Inches.

How tho Atlantic Cable II Worked
The Procces OF Ocean Tefexxaph-
ing.
VIC ma tae following Interesting account OF
the wortlnz Of tho Atlantic cable IN ! recent lex
of"Aoderp EugtnceE.ng:"
1NIGnArnT.
Ieles1aPby NAY, WIN ~ pEopr,etI. b considered
llarlJ Of modern Development A clerer writer
RAYS h1t Il 1nAy be read BY each Of the i've Bensea
On land lines each stgna1 Is made By suspendlng
Intervals Of tlnes ca1led " dots and dashes'--tae
n.e 9, WHICH II d!nessns order sons.tta.es tne
q WasR 1as r
zior roads them ty .:aound. Z" ~ eaxtly u The
urictan tesds tne letter. Of the scale By the asne
WI g.a3p ths wi1e II his hands, and 1ead TIT
AEuA!s by feeling" the tnternlsatonl OF the
now Of the electric current In like manner BY
n the same I t1,eIsssion us teis d aanseroas ~ e.
per1mentt And It Is aid thai the electricity can
Be- nAoe 70 dissolEe = chemical and produce u
en- Be- read By s:smeihns. bnt3for taia / do not
youch- behave thst the method OF signalling
9efsed nom hat on lie faad ines. Tne eutta
pezrha covering Of the COPPER n1res, under the
pressure Of great depth Of water. becomes an
through theln 70 .he extent OF 70 per cent me
n1st portion OF the electric wave Of 10 per cent
ssa, ,Ss ana + TouS Ss e Ioea %e N - 1"o
q taat portion q DC electnc!ty 1hieh
snd a ee e sSn would e IL eehe e sd
produce not only confusion. but great delay. To
remedy this Professor FAr!ey introduced a KEY,
which sends alternate currents. posltife ana mega
i've, nt such Intervals allow the rst OF ten
Per cent to yss forward and then thst portion ah-
rotbed By the covering u nsair1nEed By rs op-
posite, and the cable L. cleArsd for the transmits.
E9nn H{ 4 EhrGUd pAtr nj CnYH0tI The
used Is resJ emau one ttnree Of Daniels cups,
and the signal being only ten per cent OF TITS slnsi
suuments In Use on land. Tia tns.Knment used
consiSts Of ninute polAr11ed needle suspended
On On q ang'e strand Of 5p'de5's web; or one fto1l
minute needle i plseea n limos. micro:
aas!s a! ~ q ! asss nom eesstu! ,a@s % he eus
the right and LEFT Tor space Of time correspond.
inR 70 that oecopted IN 1he tgnal On ths lsnd Inc
sss sa9s sna o. ,paanet eeins Gsed IN nosa
room. and the br32u mirror reflects the faJ Of
light upon piece Of while paper before him, on
which black ine is drawn. 70 the right end lett
receiver reads ihcse s1Ruals BY -alght" and trans
nuts them to smother pe1on7 placed outEde oi
Tie 1asf hy at N
nc that he Dad sent tneStaEe, without eithel
Mtre or cable. ninety Two milea, across arm oi
roF, and a tpo return q hss messenger txno had
been sent With I written copJ) he found that the
HeNosrope message had been received, understood
and obesed. He had two A7ststants who ha4l
been te1es7aphlc opeIators, who had for vnole
summer been amuslnR themselves IL talking ie
each other with these tustru1nenta, though fheJ
| When the fenel General Morgan made his grea,
| raid through Indiana and Ohio. he captured ont
OF my operators, and compelled him 70 telegraph
aAkiDg how u1Any regular troops we're n that city
Morgan read by ''sound. and therefore the ope1
a1or did not dare to 3ut,:aI 70 th1t he Was uude
| tluress, and could rZ'y 7cutnrc to add an eItra
initial to bis OWL aiRn9,4r,. The receiving opers
tor Il Ctneinnstf knew that Morgan Vas IN tna
nelghbornood, aud suspee1tng from the extra mi
| e1aRgerasing th' force Of reRpiars; and the con
sequence vas that Morgan changed hts route 70
@ es est ocyoaa nt X ine e Iad ;s sno
millions OF dollAr4.