APPENDIX B 323
double telescope and the stereo tele-
scope.
S. therapeutics.-The treatment of visual
disorders by stereoscopic methods. In
wider sense it includes stereo calisthenics
and diagnostic stereoscopy.
S. typogram.-An artificial stereogram
produced bv differential spacing of
printer’s type, notably ornaments.
Stereography.-In this field, identical with
stereoscopic photography.
Stereomatics.-The art of planning and
exposing a series of stereograms in such a
way that they will tell a coherent story.
The planning of a series of stereograms of
definitely related interest and in definite
sequence.
Stereopsis.-Stereoscopic vision. The ability
to perceive depth visually, and specifically
the degree to which such perception is
possessed.
Stereopticon.-This word is included to
point out the fact that it has absolutely
no relationship of any kind with any
phase of stereoscopy although it is com-
monly used when “stereoscope” is meant.
Actually, a stereopticon is a dissolving lan-
tern slide projector as used for projecting
song slides in the old nickelodeon days.
Stereoscope.-A device or instrument used
for viewing stereograms. Not ordinarily
applied to the colored or polarizing fiIters
used with anaglyphic stereograms.
American S.-The Holmes (or Mexican)
open type of viewer.
Bates S.-Bates took over the very crude
Holmes skeleton viewer and produced
what was substantially the same parlor
viewer which we know today.
Box S.-The enclosed type of viewer.
European type.
Brewster S.-A viewer incorporating two
ha!f lenses which thus form spherical
prisms, mounted base out.
Brumberger S.-Plastic, self illuminated
viewer for 35mm stereograms.
Busch S.-Plastic, self illuminated viewer
for 35mm stereograms, specifically those
made in the Verascope F-40.
Cabinet S.-A stereoscope built as a
piece of furniture; a finished cabinet
enclosing the automatic or semi-auto-
matic mechanism.
Holmes S.-Open type Brewster viewer,
also American or Mexican.
Mattey S.-The firm of Mattey of Paris
is one of the few which makes viewers
exclusively in all grades from folding
cardboard viewers to the finest inlaid
wood models of automatic classifiers.
Mirror S.-Usually the Wheatstone or
Pulfrich type of viewer.
Pedestal %-An automatic cabinet viewer
placed upon a cabinet pillar or pedestal
which forms a cabinet for the slide col-
lection. Either one or two piece.
Pocket S.-Folding stereoscope for carry-
ing in the pocket. Usually of inferior
quality.
Pulfrich S.-A small viewer of the Wheat-
stone type for tabletop use. See Ryker.
Realist S.-Plastic, 35mm viewer self il-
luminated. Companion to the Stereo
Realist camera.
Reflecting S.-A viewer of (A) the gen-
eral Wheatstone type or (B) an auto-
transposing viewer.
Richard S.-Companion viewers to the
Verascope cameras, usually self trans-
posing type in 35mm sizes.
Ryker S.-A tabletop stereoscope of the
general Wheatstone-Pulfrich type but
equipped with magnifiers for the study
of detail. Military-aerial instrument.
One of the best examples of the Wheat-
stone type.
Stereo-Vivid S.-Self-illuminated plastic
viewer, companion to the Stereo-Vivid
camera. 35mm.
Transposing S.-A viewer which by an
arrangement ot reflectors or a refracting
system makes it possible to view stereo
images which have not been transposed.
Used with film-strip stereo views.
3D S.-This is actually a “viewer” rather
than a “stereoscope” inasmuch as it con-
sists of a pair of goggles equipped with
polarizing lenses. Used to view stereo
projected pictures. Vectographs and the
like.
Universal S.-(A) A viewer which may
be used either as a normal or as a
Brewster instrument. (B) A viewer, such
as a classifier, which will take a variety
of sizes of stereogram.
Wheatstone S.-A viewer which uses sep-
arate stereo units, usually facing each
other, which are viewed as reflected
images. Largely used for stereo X-ray
and large print stereo.
Stereoscopic.-Having to do with stereo-
scopy.
S. balance.-A term used in stereo com-
position in differentiation from the pic-
torial balance of a plane surface.
S. camera.-A camera used for making
stereoscopic negatives or images, speci-
fically a dual chamber camera.