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The Boy Mechanic: Volume 1 - 700 Things for Boys to Do by Popular Mechanics Co.
page 69 of 996 (06%)
does not heat sufficiently, cut some of it off and try again.
About 9-1/2 ft. of No. 26 gauge heating wire will be about right.
The connection to an electric-lamp socket is made with ordinary
flexible cord, to which is attached a screw plug for making
connections.



** Glass-Cleaning Solution [31]

Glass tumblers, tubing and fancy bottles are hard to clean by
washing them in the ordinary way, as the parts are hard to reach
with the fingers or a brush. The following solution makes an
excellent cleaner that will remove dirt and grease from crevices
and sharp corners. To 9 parts of water add 1 part of strong
sulphuric acid. The acid should be added to the water slowly and
not the water to the acid. Add as much bichromate of potash as the
solution will dissolve. More bichromate of potash should be added
as the precipitate is used in cleaning.

The chemicals can be purchased cheaply from a local drug store,
and made up and kept in large bottles. The solution can be used
over and over again. -- Contributed by Loren Ward Des Moines,
Iowa.



** Automatic-Closing Kennel Door [32]

When the neighborhood cats are retired for the night and there is
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