The Washington herald. [volume] (Washington, D.C.) 1906-1939, 1915-02-28

| Back in the city again that night
Garrick through the police issued a
general alarm. country wide. Every
| where that the net could be spread
! lines were out One of the first things
he had decided on was watch OF
LuiGfs. To the surprise of every one.
! ii was reported that Luigi. too. had
disappeared. Nor had the police any
trace whatever of the three assassins
who had shot down Dominica.
! Down in his office Garrick had set
up peculiar instrument and had
made arrangements for the leasing OF
| a telephone wire at short notice to al
most any part of the country. That
night and far into the morning he was
working over peculiarly complicated
mechanism consisting of electro-maG
| nets. rolls and a stylus. With the most
minute care and precision he adjusted
a delicate piece of clOckwork which
J formed part of the apparatus. The
next morning saw him at RockcreSt
again. with Cooke and Riley. looking
! over Bardo's in the daylight. There
was little additional evidence except
/ that in a room which had apparently
been occupied by Francesca there
were evident marks OF a struggle.
What it portended could not be
| guessed.
! The ransackinG of the place was far
! from complete when a swift roadster
| from Cookies pulled up and the driver
| hoped out. calling breathlessly:
There's just been a message from the
Boston police. They received an anony-
NOUS letter telling them to watch two
men who are sailing for Genoa this
morning. They have no evidence
against them and are afraid to detain
] them for fear of damages for false
arrest"
! An anonymous letter" thought Gar
rick to himself. Gould Francesca be
| springing her revenge"
Two mem" repeated Riley. in
| tone that grated on Garrick's nerves.
They cIambered over the roadster and
hurried to the nearest town. There
Garrick fumed until he got long dis
tance and was in touch with his agent
in Boston. a young man named Clark.
y brief conversation followed. and a
few minutes later Garrick was speed
Ing to his office. with Cooke and Riley
What's all this" asked Cooke. indi-
eating the magnets. rolls and clock
work. as they entered the office at last.
Before Garrick could answer. his
own telephone tinkled.
Hello" he answered. "Yes-this is
Garrick. Hello. Clark. It's all ar
ranged at this end. too. Have you a
good connection? Bully, My syn
chronizer is working fine here, too.
All right. old man-shoot!'
As Garrick gave the final touches to
the peculiar apparatus on the table.
the cylindrical drum began slowly to
revolve and the stylus or needle press
cd down on a roll of sensitiZed paper.
with which the drum was covered. ap-
parently with varying intensity as it
turned. Around and around the cylin-
der revolved like strange sort OF
graphophone.
This. Mr.. Cooke" cried Garrick ex-
citedly. lis the electric eye-the tel
electroGraph invented by the English
man Thorne Baker. 1t makes possible
the electric transmission of photo
graphs. using the telephone wires be
cause they are much better fitted for
it than the telegraph
Cooke and Riley were watching
eagerly. Slowly the stylus traced out
the beginning of a picture on the pa
per. 1t was only n thin band now.
yet. line by line. it widened. Still.
they could not guess what it was
about to reveal as the ceaseless revo-
lutions widened the print.
What is this telelectroGraph:
queried Cooke.
IN the Baker apparatus" answered
Garrick slowly. the various steps are
not so difficult to understand after all.
First an ordinary photograph Is taken
and a negative made. Clark has done
that. with the aid of the Boston police.
Then a print is made and a wet plat
negative is printed on sheet of SEN
sitized tinfoil which has been treated
with a single line screen. Well. in this
case. Clark uses a screen composed Of
lines running parallel in one direC-
ton only instead of crossing at right
angles. An ordinary half-tone is COM
posed Of minute points. some light.
some dark. This print is composed OF
long lines some shaded in part light.
in part dark. giving the effect of a pic
ture-such as artists often draw as
freaks just to show how clever they
are at shading.
This tinfoil negative is wrapped
around a cylinder at the Boston end OF
the line and a stylus with a very deli
ate. sensitive point begins passing
over it. crossing the parallel lines at
right angles-like the other lines of the
regular half-tone. Whenever the point
of the stylus passes over one of the
lighter spots on the Photographic print it
sends a larger electrical vibration; over
the darker spots a shorter vibration.
The ever-changinS electrical current
passing through the stylus vibrates with
miles of telephone wire between Boston
and this instrument here at the other end
of this special line. In this receiving
apparatus the current causes another
stylus to pass over a sheet of sensitized
chemical paper. such as We have here.
The receiving stylus passes over the pa
per here Simultaneously with the trans
hitting stylus in Boston. The Impression
that each stroke OF the receiving stylus
makes on the paper is black or light. ac-
cording to the length of the quickly vary
ing vibrations of the electric current
tran smitted to II. White spots on the
Photographic print come out here as
black spots on the sensitized paper. over
which the stylus before US Is passing. and
Woo versa. In that way. you can see.
tho positive print grows here before your
very eyes as the picture Is transmitted
from the negative which Clark has pre-
pared ana Is sending US from Boston.
We shall soon know now VINO these men
are
They bent over anxiously TO see what
the telelectrograph was doing. 1t was
indeed reproducing faithfully in New
York what mortal eye otherwise could
see only In Boston. Gradually the pic
ture began to take form. AS II did
Garrick watched II carefully. The ma
chine had ceased to revOlve- GarriCk
stripped the still wet photograph off the
telelectrograph and stood regarding II
with surprise.
Luigi" he exclaimed. shaping down
the now dry print that had come in by
the seeing -over-a-wire" machine.
He was plainly mystifled. Who was
the other-Gaetano? Where was Fran