rs so that it will be partly in the
tube and partly without. The platinum will stick to the glass, and
if glass is sufficiently heated one will be able to pull it, by
means of pliers, from one side of the hole to the other, thus
sealing the wire into the tube. Another wire is sealed in the same
way about 1 in. from the first. Now, to bend the tube, one must
hold it, with both hands, in the flame and turn constantly until
soft. Quickly withdraw from flame and bend, just as you would a
piece of copper wire. Allow to cool slowly.

The several tubes are connected with a short piece of rubber
tubing.

The total cost of materials for constructing the apparatus
complete will not amount to more than one dollar.
--Contributed by M. G. Kopf, Lewis Institute, Chicago.

** Weatherproofing for Tents [389]

Dissolve 4 oz. sulphate of zinc in 10 gal. water; add 1/2 lb.
sal-soda; stir well until dissolved, and add 1/2 oz. tartaric
acid. Put the tent cover in this solution and let lie 24 hrs. Take
out (do not wring it) and hang up to dry. Grinnell's Hand Book on
Painting.

** Sawing Sheet Metal [389]

Sheet metal placed between two boards in the jaws of a vise and
clamped tightly, can be sawed easily with a hacksaw.

** A Monoplane Weather Vane [390]

The toy windmill or weather vane shown in the sketch is made to
represent a Bleriot monoplane.

[Illustration: Wire and Sheet-Metal Vane]

The propeller is turned by the wind. The frame is made of heavy
wire and connected with straps of tin. The construction is plainly
shown in the illustration. The windmill vane can be made in any
size to suit the builder.
--Contributed by W. C. Bliss, St. Louis, Missouri.

** How to Make a Minnow Trap [390]

Glass minnow traps that will give as good service as those
purchased at the tackle store can be made without difficulty. If a
trap should be banged carelessly against the side of the boat or
some other obstruction and smashed, instead of spending several
dollars to replace it, a half hour's time will turn out a new one
just as good, says a correspondent of Outing.

A trap of this kind can be made from an ordinary fruit jar such as
used in putting up preserves, either of one or two-quart capacity.
A one-quart jar gives good results, but if the bait to be caught
is of fairly large size, the two quart size may be used. As the
jars have the same style top they can be used interchangeably with
one mouthpiece.

The mou