This will reduce 40 to 50
volts down to 5 or 10 volts for short lengths
[Illustration: Simple Rheostat]
of time.
--Contributed by Roy Newby, San Jose, Cal.
** Homemade Shoe Rack [146]
The accompanying sketch explains how a boy can make his own shoe
rack that can be placed on the wall in
[Illustration: Shoe Rack]
the clothes closet. Figure 1 shows the construction of the bottom
to permit the dirt to fall through. Two boards, 9 in. wide and
about 3 ft. long, with six partitions between, as shown, will make
pockets about 6 in. long. The width of the pockets at the bottom
is 2 in. and at the top 5 in.
--Contributed by Guy H. Harvey, Mill Valley, Cal.
** How to Waterproof Canvas [146]
The method used by the British navy yards for waterproofing and
painting canvas so it will not become stiff and cracked is as
follows: One ounce of yellow soap and 1/2 pt. of hot water are
mixed with every 7 lb. of paint to be used. The mixture is applied
to the canvas with a brush. This is allowed to dry for two days
and then a coat of the same paint, without the soap, is laid on.
When this last coat is dry the canvas may be painted any color
desired.
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