Montgomery County sentinel. [volume] (Rockville, Md.) 1855-1974, 1858-08-27
photographic Instruments.

Acicgfaphic lhStfumcntS.
As the Electricians are supposed to be
experimenting at Trinity Bay and Va
lentia with the various recording instru-
ments in use, it is of interest to know
what are the chief differences between
them,
The Morse instrument, in common use
from the first in this country, transmits
messages by the alternate breaking aud
recounocting Of Tic electric current.
The current allowed to flow moment
produces dot, if little longer line.
The operatcs taps on single key ard
the message are recorded BY ar alphabet
composed of combinations of Gues and
dots, thus - - - -
- --- -. In the hands Of
an expert the speed of this instrument is
about twenty words minute.
The Cooke and Wheatstone instru-
ment is the one that until lately has been
generally used in England. A needle
on dial plate reyolves, pointing out The
letters, which are inscribed around the
circumference like the hours on the face
of a clock This is much more intel
llglble process to outsiders; but it is
slow, accomplishing at the fastest only
about fourteen words a minute.
The House instrument prints the mes
sage in Roman capitals on long strip of
paper by the revolution of type wheel,
the operator playing on keyboard like
that of piano, with key for each
letter. The printing is done by clock
work, the use Of the electric current
being to preserve equal time, so that the
letters Of one machine may correspond
to those of the other. This instrument
prints twenty-five to thirty words min
ute.
The Hughes instrument is a combi-
nation Of the Morse and House inven-
tons. In the Morse instrument two or
three pulsations of the electric current
are required to indicate one letter. In
the House instrument it requires from,
one TO twonty-eisht pulsations In the
| Hughes instrument it requires but q sin
gle pulsation for each letter. The mech
anism by which this is accomplished is
simple, though the principle on which it
is based is complex Tbs type wheel,
at the respective stations reyolye to print
the message, and their revolutions arc
! governed by vibrating springs These
I springs cause them to rcyolye in exactly
the same time. There is an acoustic
/ principle involved, viz that two springs,
i which s5fyo the same musical tone wlsH
I vibrating, yibrata The same number OF
times per second. The springs ere there
fore chosen and regulated by sound -
This instrument il IS evident economies
both t,'nc and electric power. Its ex-
ceeding sensltiyeness to the least porcep-
tibe pulsation of the electric currents
adapts it especially for long lines and
submarine cables 1t is capable Of wri-
ling forty words a minute, with about
onc-tcnth the battery power Of other in
struDegts, and sends messages both
ways at once At least 50 its inventor
claims and it is to be tested on the At
iantic cable -Aibauy journal.
EXPRESSIVE MoTroEs During the IL
luminotions and rojoicings on Tuesday
night u the city Of New York some sin
gularly pithy and expressive notices
were presented through the Transparent
cies. We select few;
"LTGHTSGG: Caught and tanned by
Franklin Taught to read and write and
60 on orrands by Morse. Started in
foreign trade by Field, Cooper & Co.,
with John Bull and Brother Jonathan as
special partners"
" The Atlantic Cable The strongest
cord Of England and America"
" The Atlantic Telegraph; Symbol
and pledge of perpetual international
friendship. Honor to its successful pro.
motors. Blessed are the pcacemakers ~
" All the world Knox under to Anne
rican enterprise: There were kings be-
fore Agamemnon, but Me Agamcmnon
is king Of them all. 1t took two rivers
TO conquer the Atlantic--the Niagara
and Hudson
"Canst thou send forth the lightnings,
that they may go and say to thce--IIerc
we re.'--Job, 1895.
" Let the foods clap their hands, and
letthc bills be joyful together. "-Ps 1913.
PRINrERs' PRovgRBs. Never inquire
thou Of the editor the news, for behold
it is his duty at the appointed time Ia
give it unto thee without asking. When
thou dost write for his paper, never say
unto him, "What thnkcst thou Of my
piece 2 lest that the truth will ofsHt,
thee. 1t is not fit that thou shouldst ask
him who is tho author Of an article, for
his duty requires him to keep ouch things
to himself When thou dost enter into
bis Office, have care 10 myself that thou
dost not look at what may be lying open,
for that is not meet in the sight Of good
breeding. Neither examine thou the
proof sheet. for d. IS not ready 10 meet
thine eye, that thou maycst understand
il.
Gtg- A man who is very rich now, was
very poor when he was a boy, when
asked how hc got his riches, he replied
MY father taught NC never 10 play
anti my work was finished and never
spend my money Until J bad earned it.
lf bod tgt one hours work in day,
{ must DO that tie frs. thing, and in an
ii i'll T.. D b.