User manual

Dark-colored
wall
and
hangings,
and
only
one
window:
bright
sun
outside,
40
econds;
hazy sun, 80
seconds;
cloudy
bright,
2 minutes 40
seconds;
cloudy dull. 5
minutes
20
seconds;
The
foregoing
is
calculated
for
room
whose
windows
get
the
direct
light
from
the
sky,
and
for
hours
from
three
hours
after
unri
e
to
three
hours
before
sunset.
If
earlier
or
later,
the
time
required
will
be
longer.
The
Slops-Single
lel/s.-If
the
middle
top
is u ed gIve
twice
the
time
of
the
table;
if
the
smallest
top
is
used
give
four
times
the
time
of
the
table.
The
Slops-Double
Lens.-If
the
third
top
i u
ed
give
twice
the
time
of
the
table;
if
the
fourth
stop
is
used
give
four
times
the
time
of
the
table.
If
the
large
t
top
is
used
give
one-half
the
time
of
the
table.
TIME
Expo
URE
IN
THE
OPE
AIR.
When
the
smallest
stop
is in
the
lens,
the
light
admitted
i
so
much
reduced
that
time
exposures
out
of
doors
may
be
made
the
same
as
interiors
but
the
exposure
IUU
t
be
much
horter.
3
0