Los Angeles herald., 1910-09-11
THE ART AND PAsTIME
OF PHOTOGRAPHY


perhaps the exception of the stereo-
graph with that afforded by the pro-
jecting or So-called magic lantern
whereby one may view ones produc-
tions in almost natural size. The cast
of lantern is possibly the chief OBJ
struction to be met, but very neat
single lanterns can be bought for about
$35 complete for use with either acety-
lene gas, alcohol gas or electricity.
A plain white tinted wall makes the
best possible screen, being perfectly
flat and always in place when re-
quired.
The user of a three and a half by
three and a half or three and a quar-
ter by four and a quarter camera can
make transparent slides on glass near
ly as easily as prints on Velox or
similar papers, by exposing them in
contact in a printing frame. Being
more sensitive, they require much less
exposure and can therefore be rapidly
printed and then developed practically
like negatives. After the usual fixa-
tion and washing they are left to dry
and then bound up with plain glass
covers by strips of gummed paper and
are ready for the lantern.
For those using a four by five or
five by seven camera slides can be
made by reduction, using the ordinary
plateholder wooden rebates or kits to
take the three and quarter by four
lantern slide plates. This method is
preferably carried out by daylight and
the negative from which slide is to be
made should be set up against a win
dow covered with white tracing cloth
to diffuse the light; the camera can be
used on it's regular tripod or placed
on a table and raised to proper level
by means of boxes. The lens should be
opposite the center of the plate. The
exposure is then made directly on the
lantern slide plate and developed with
any good developer, such as Rytol,
Metol-Quinol or Hydrochinin alone.
Fixing can be done in the regular acid
fixing bath, though if coloring is in
tended a fresh, plain hypo bath is bet
ter owing to the acid bath making the
emulsion more difficult to color evenly.
In developing for projection the OBJ
ject to be aimed at is transparency
and the strongest shadows should per-
nit the easy reading of printed matter
through them, while the high lights are
practically clear glass. A few test ex-
posures can be made on one plate by
drawing the slide of plate holder suf-
ficiently to uncover about one inch
at time and exposing equally at each
withdrawal of the slide SO that the
first section uncovered will receive al
together about four times as much as
the last by reason of the cumulative
effect of the three later exposures.
Using stop FIG in good diffused light,
try starting with two seconds expos
ure. Upon development the four sec
tions will give a test chart for sue
cessful exposures.
Before proceeding to focus on the
ground glass of camera attach a Ian
tern slide mask of suitable shape and
opening at its center by means OF
gummed strips so that all that is de-
sired in slide can be made to occupy
the space SO matted. Pushing the
whole camera to or fro will readily
show when position is right, and per-
feet definition can be achieved by
means of rack and pinion on camera.
Special instruments are made for max
ing slides from negatives of stated
sizes which require no focusing, the
negative merely being placed at one
end and the slide plate at the other.
The operation is as simple as that or
the Brownie enlarger reversed so that
reduction instead of enlargement takes
place therein. After the slides are
dried and cleaned the selected mat is
placed on the emulsion side and the
cover glass, also cleaned, is put against
the mat and the whole bound together
with black or white binding strips.
If white is used the title can be marked
in ink on the bottom side so as to be
read easily when slide is inserted in
lantern carrier
Those who have attended exhibitions
of pictures shown by this means, and
who among us has not, will know how
much pleasure and interest may be en-
ioyed by seeing their own pictures so
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