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1 definition found
From:
Webster's Revised Unabridged Dictionary (1913)
Op·ti·graph
n.
A
telescope
with
a
diagonal
eyepiece
,
suspended
vertically
in
gimbals
by
the
object
end
beneath
a
fixed
diagonal
plane
mirror
.
It
is
used
for
delineating
landscapes
,
by
means
of
a
pencil
at
the
eye
end
which
leaves
the
delineation
on
paper
.
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