Daily capital journal. (Salem, Oregon) 1903-1919, 1907-12-25
SENDING PICTURES BY WIRE.

The process OF Professor Korn of
Munich for telegraphing pictures
depends upon the well-known fact
that selenium varies in its conduc-
tivity of electricity according to the
amount Of light which falls upon Il.
A Aim of the portrait or picture de-
1 sired to be reproduced was mounted
on a cylinder in the transfitting ap-
lparatus. A ray of light from a vac
uum lamp was focused through the
film on 10 a prism within the cylinder
and refracted TO selenium plate
below. on slowly revolving the cyl
inder the light playing on the sele-
MUM plate varied in intensity and
caused a corresponding fluctuation
or pulsation OF the electric current
passing through the plate. This cur
trent by an apparatus reversing the
process at the other end OF the sys-
TEN, was made 20 produce corre-
spending fluctuations in light upon
a sensitive film, mounted on a cyl
inder which revolved at exactly the
same speed as the one at the trans
mitting station. IL this way, as the
beam at the transmitting station
passed through successive points on
the original Aim, the light value OF
these points was faithfully repro
duced In reverse or negative at the
receiving station. A number of re-
markably clear Photographic por-
traits were reproduced in this man
ner, over the Korn systm, in spite OF
artificial obstacles which we're made
equivalent TO the resistance Of many
Thousands OF miles of telegraphic
wire. Since then there have been a
number of other inventions along
the same line which make IL prob
> able that the day is not distant when
the telegraphing of portraits or pic
lures for commercial or police pur'
poses will be successful.
. The system OF the Belgian engi
neer. Carbonelle, is mechanical, like
5 only allows drawings or photographs
to be transmitted to a distance IN
= an extremely short interval OF time
but enables a block ready for print
ing to be produced Immediately a
! the receiving station. The sendinl
: apparatus Is so designed as to utilize
J. for the transmission of pictur~
p either the differences in electrica
B. resistance shown by a Photographic
" plate or film, according TO th'
amount of metal silt present at ii
q different points, or else the differ
i ences in the thickness of the gelatin
L layer of a Photographic carbon print
S. picture drawn with uon-conduciv
ink on metal foil can likewise b.
r, readily transmitted. In all cases re
l. productions will take place at tn
Il receiving setation Immediately
without any developing process. Tn
r. Carbonelle system appears to be su
is perior to that of DR.. Korn, in IL
ell rapidity and practicability, and sug
gests a method by which the neces
sity OF a signal or code for ordinar
messages may even be eliminated
5, and an automatic telegraph instru
y, ment produced. For example. IL l
,r claimed that the handwriting of tn
20 ordinary telegram can be exactly re
is produced, and that the system vii
s. transmit as many as 100000 to 500
It 600 letters per hour, according as tn
n apparatus is used in simple or du
er pick connection. The speed at whicl
d blocks can be prepared will be in
sr ferred from the fact that the appara
Ie tus will engrave a block four by sevel
E, In one minute.