The Saint Paul globe. (St. Paul, Minn.) 1896-1905, 1899-04-09
MARRIED OR SINGLE
To Print by Means Of the X=Ray.


The latest use to which Roentgen's
wonderful discovery has been put is that
of printing. and DR.: f. S.. Kolle. of New
York city; asserts that by the aid of the
X-rays man may be able to print 750,-
OOe copies of newspaper. in single day
He recently gave an exhibition of the X
ray as a substitute for the printing press,
says the Chicago Chronicle.
"A majority of newspaper reading peo-
pie have become familiar, through re-
reated description. with conditions sur
rounding the use of the X-rays. In this
case ell ordinary requirements We're COM
Piled with. The coil, or battery. was plac-
ed on table, while in an adjoining room
a red bulb cast through the open door
a dim light. Attached to the coil was an
ordinary Roentgen tube, being a spherical
glass globe with a small platinum shield
to reflect the ray.
The coil used by Dr.. Kolle was. one
manufactured expressly for him. 1t con-
tains $50 miles of wire and is capable of
eXerting a force of 100000 volts. Not all
this enormous voltage was used, however.
When all was ready for the experiment,
Dr. Kolle took a dozen sheets of sensitiZ-
ed paper, wrapped them in light proof pa
per and placed them in an envelope. To
describe this envelope and its contents
DR.. kolle has coined tern-.senso-
block'-which is merely meant to mean a
block of sensitized matter
: This so-block was placed upon the
table. On it was laid the matter to be
printed. The words to- be printed had
been prepared on an ordinary white busi-
ness envelope. DIR. Kolle explained that
it was necessary to use ink entirely
opaque, so the X-lay" could not penetrate
it. He was some time in devising an ink
which would answer the purpose. but
finally produced pasty substance of a
deep pink color.
MAKING THE EXPOSURE
When the matter to be printed had
been laid on top of the senso-block the
tube was lowered so that the platinum
disk would send the X-ray directly down
ward and through both. Then the cur
rent was turned on and for few sec
onds nothing but the white bulb was Wis
ible.
''I guess that is long enough" said Dr..
Koile to an assistant, who was operating
the coil, and the current was turned off.
The sheets of paper were taken out of
the envelope and placed In bowl con-
tanning some ordinary developing fluid.
After they had remained in the duid for
a few moments DR.. Kolle took one out
and passed it to one of the observers.
The words were plainly visible.
$50 you see,' said DR.. Kole. that the
ray can print. AS yet, as you have
seen. this possibility of the ray is in its
primacy. What l have just shown you
has been done with the crudest facilities,
yet it amply demonstrates the funda-
mental principle. To bring printing by
this method to practical use will require,
besides certain scientific difficulties yet to
be overcome, mechanical inventiveness
far beyond my knowledge or skill. But
I have not the slightest doubt that with
in ten years. or perhaps even shorter
period. typoradiography will become an
important and useful art
MANY IMPROVEMENTS NECESSARY.
''Of course. many improvements must
be made on my experimental methods.
At present / can only print white let
tiers on black background To be of
practical use this must be reversed. 1
think / can accomplish this without
great difficulty. An ink made of bichro-
matte mucilage may be used for the
letters. while the remainder. or white