SCIOPTICON MANUAL.
145
The Sciopticon Tinters.—The tinting-glasses are
drawn np close behind the objective lens by means of
rods terminating in knobs above. This lets the color
down upon the screen—not with a sharp outline like
the curtain, but with a gradual shading. With the blue
tint partially drawn, this property gives to plain pho¬
tographs of scenery, a blue sky, shading off without
abruptness down to the horizon. Slightly drawing up
the blue, then the red, and then turning the button
attached to the opaque curtain a little, fades away
gradually the upper portion of the disk, as is desirable
in such slides as the Ascension. The reverse movements
bring into view gradually the “ Soldier’s Dream,” “An¬
gel of Peace,” &e., nearly as well as with two slides in
the dissolving lanterns. All the appearances formerly
pi’oduced by colored glass slides are better effected by
these tinters. If at any time the rods become too loose,
the stop screws may be tightened.
The New Slide Stop.—The ca'tch drawn out from the
underside of the stage, and turned back almost out of
the way, is intended to stop the slide in its proper posi¬
tion, but not to interfere with its being moved smoothly
along and out by the incoming slide when slipped for¬
ward from the catch by the left hand.
The catch pushed back into its sheath, leaves the
stage entirely unobstructed for those who prefer to ad¬
just the slides by hand only, and for other than wooden
slides.
The use of stops is the more necessary with a paii of
instruments, as it is essential to a proper effect that the
dissolving views should occupy exactly the same place
on the screen without any readjustment after the dis¬
solving becomes visible.