Last Updated：2022/12/24
It would be a very simple matter to include with each keyboard, whether for night signal sets or day semaphores, a small vertical panel with miniature reproductions of the night lanterns in their proper color and position, and of the day shapes in proper order; these last to be made by illuminating a circular aperture containing a darkened glass disc with the figure of the shape in white.
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It
would
be
a
very
simple
matter
to
include
with
each
keyboard,
whether
for
night
signal
sets
or
day
semaphores,
a
small
vertical
panel
with
miniature
reproductions
of
the
night
lanterns
in
their
proper
color
and
position,
and
of
the
day
shapes
in
proper
order;
these
last
to
be
made
by
illuminating
a
circular
aperture
containing
a
darkened
glass
disc
with
the
figure
of
the
shape
in
white.
