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290 To drive away Cockroaches
Put powdered borax in the runways
For ants use Borax and Sugar
To clean bottles from Fat
Pour in warm water, fill the
bottle with common Hay and use
a stick. Then rinse the bottle
until clean water
To make a drill for glass
Use a fine drill made of new
steel, heated to a dark red and
plunged into Chloride of Zinc.
The drill must be sharpened before
it is hardened.
To Drill glass
Moisten the spot with a mixture
of 25 parts Oxalic Acid to 12
parts Turpentine. Keep it tightly
corked. Use usual drill
To Convert Knots into Miles
To the given number of Knots, add
1/10 and 1/2 of that number and
that will give the miles. Example
given number of Knots 20
20
2 is 1/10
1 is 1/2
23 Miles
If the Exact number of miles is required
add 8 feet for Each Mile. Thus the
Exact answer to above Examples would
be 23 Miles and 184 feet
Scientific American 1897
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Cement for a glass Flask 291
Take Dissolve [struckthrough] the best Kind of glue. Pour on an
Equal quantity of Water. Let it soak
over night. Next morning melt it over a
gentle heat and add fine Paris White or
White Lead. Mix well and add a little
acetic Acid, Carbolic Acid, oil of cloves
or any other thing to prevent spoiling.
This cement will also do for leather.
It will not stand boiling water
Scientific American
Slip of the Wheel
On vessels, it is the differance between
the actual differ [struckthrough] distance run, and
the distance that would have been
covered had the propeller acted upon a
solid substance instead of a fluid.
In other words, the Expression may be
understood as the lost motion of the
propellor. It is usual to allow a
certain number of revolutions to the
or paddles, to the mile, and at the End
of a stated time, the Estimated
distance run by the ship, according to
the number of turns made, is compred
with the actual distance run by the ship
according to observation of the heavenly
bodies, or by the patent log and the
differance between these two records is
Expressed as a percentum and Entered
in the log book as "Slip of Wheel"
Retardation by reason of headwinds
and high seas, comes under the head
of Slip. For Example; if the distance
ran according to revolutions is 100 miles,
and the actual distance run is 75 miles,
the slip of the wheel is 25 per cent
Copied from
Scientific American Supplement
July 10 1897 page 17949
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