This straight-sided jar is made in three pieces. A disc 5 ins. in
diameter is needed for the bottom, a cylinder, 5 ins. deep, to fit the
disc, and a lid made from a 5-in. disc turned over to fit the outside.
[Illustration]
The disc for the bottom is bent up like the base of the tea caddy. Fit
the cylindrical piece around this base and solder where the edges meet.
_The lid:_ Cut a disc out of No. 20 copper, 5 ins. in diameter. Find
the centre. With the small end of the planishing hammer drive a boss
into a hollow wooden block, about 3/4 in. in diameter and 1/2 in. deep.
Out of this boss the knob is made in the following way: Take a piece
of 5/8-in. square iron and draw about 4 ins. of the end tapered to a
3/8-in. round. Bend this up about 1/4 in. as shown in the sketch. This
is the tool that the knob must be shaped upon. Place this tool in the
vise and place the hollow of the lid on this tool. With the thin end
of the driving hammer work the knob in shape from the outside. (See
sketch.) During the working of this metal it should be annealed three
or four times so that it will yield to the extreme tension required to
make the knob.
[Illustration]
The lid is rounded in the same way as the bottom piece was. There
is some shaping to be done on the top of the lid. The picture here
shows that plainly. On the inside of the lid are two wires soldered
crosswise to hold a damp sponge in place. This sponge keeps the tobacco
moist. Finish and polish.