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252 Cement for Chemical Apparatus
Mix together 5 pounds Rosin, 1 pound
Wax, 1 pound Red Ochre, 2 oz [ounces] plaster
and melt the whole with moderate heat Sept 2 1865
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Cement for Marble or Stone
To use in Exposed places, 20 parts of clean
white sand, 2 parts of litharge, 1 part
of quick lime, mixed to a putty with
Linseed oil. Hardens quickly Sept 2 1865
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Cure for Scalds
Ordinary pure white Lead mixed with
Linseed oil is splendid Nov 18 1865
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Cement Iron to Stone
6 parts Portland Cement, 1 part of
powdered Lime (not slaked) 2 parts Sand
1 part Slaked Lime, Mixed with water,
Dampen the use when using. Set hard
in 48 hours May 9 1868
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Whitewash "Paris White"
For Each 16 #bs [pounds] of Paris White use 1/2
pound White Glue. Cover the glue with
water overnight and in the morning
melt it carefully. Stir the Paris White
with Enough hot water to make it of
the proper consistency, stir in the glue
and mix thoroughly. May 30, 1868
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3 Circles
If you cut out 3 circles same size
and lay together they seem different
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RIGHT PAGE
How to Read a "Gas Meter" 253
At the top of the meter is placed a
small tin case, 3 or 4 inches long,
and contains a plate with 3 small
dials, about 1 inch in diameter, which
are furnished until 1 pointer apiece,
moved by cogwheels and pinions on the
inside, which in turn are made to revolve
by a larger wheel, propelled by the passage
of the gas. The circle on the dial is
divided into 10 spaces, numbered round
the Edge like figures on a clock. The
dial on the Extreme right, indicates by
means of the pointer, the burning of
100 feet of gas; the deal of the middle
indicates the burning of 1000 feet; and
the dial on the left the burning of
10,000 feet. For instance; the 3
pointers all stand at cypher. The
pointer on the right hand having
moved from 0 to figure 1 indicates
that 100 feet of gas have been burned.
If it moves to 2, 200 feet, and
so on, until the pointer has gone
round the circle and again reached
the cypher, when 1000 feet have
been consumed.
When this point
has been reached, the eye will be
directed to the next dial, when
it will be found that the pointer
has moved to the figure 1, showing
that 1000 feet have been used.
The pointer on the first dial still
Keeps on, still marking the amount
passing. Suppose that tt the End
of the first month, the pointer on
the first dial stands at 8, that
on the second between 1 and it
is Easy to understand 1800 feet
have been consumed. When the
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