Figure 1 shows how the box is made. It should be 4 in. wide and 6
in. high

[Illustration: A Good Trap for Small Animals]

on the inside. The top and bottom boards project 1 in. beyond the
side boards at the back and the end board is set in. The top board
should be 2 in. shorter than the sides at the front. Nail a strip
on the top board back of the door and one on the bottom board so
the game cannot push the door open from inside the trap and get
out.

In the middle of the top board bore a hole and put a crotched
stick in for the lever to rest on. Bore another hole in the top of
the door for the lever to pass through. Two inches from the back
of the box bore a hole for the trigger, which should be made out
of heavy wire in the manner shown in Fig. 2. The door of the trap
must work easily and loosely.

** Novel Electric Motor [395]

The materials necessary to make this motor are an old electric
bell of the "buzzer" type and a cogwheel from an old clock.

Remove the hammer-head and gong from the bell, then bend the end
of the hammer into a loop, as in Fig. 1. Now make a little wire
catch like Fig. 2, and fasten its loop into the loop of the
hammer. Mount the bell on a small board as in Fig. 3 and fasten
the cogwheel almost on a line with it. Now press down the hammer
and place a nail in the position shown in the diagram so that the
catch touches one of the teeth.

Fasten the board in an upright position and attach two dry
batteries to the binding-posts. If properly connected, the
fly-wheel will turn quite rapidly and with amazing force for so
small a machine. The machine, however, has a fixed direction as
shown by the arrow, but the belting can be arranged so as to send
the models in a reversed direction if required. The materials for
the motor should not cost more than

[Illustration: Novel Electric Motor]

25c for the bell and if you have an old bell it will cost next to
nothing.
--Contributed by Fred C. Curry, Brockville, Ontario.

** How to Print Photographs on Silk [396]

Silk, satin or any other fine material can be used to make
photographic prints, but the most attractive results for the
amateur are obtained on silk, the best color for this purpose
being either cream or white, says Photography. The chemicals
required are only four in number, and a comparatively small amount
of each will suffice, so that the process can be tried without any
very great outlay.

A dram of dextrine is mix