in Fig. 2, which represents the back side of the door.  Sheet metal or tin is cut to the proper size and tacked around the edge of the hole.  This prevents the animal from gnawing its way out, also provides a way to make the hole of different sizes for squirrels or other animals.  The hole in the door should be about 2 in. wide and 4 in. high for rabbits.  The door is made to swing freely on two large nails driven through the sides of the box.  The hole in the door being only large enough to admit a small portion of the rabbit’s head, the rabbit will push its way through to the bait, causing the door to swing back and up, and it will close by its own weight when the animal is inside.  A small door is provided in the other end to remove the animals caught.

The advantage of this trap is that where one animal is caught others are liable to follow, and several rabbits will be trapped at a time.  Then, too, the rabbits are not harmed in any way as they would be if caught in an ordinary trap.  —­Contributed by H. F. Church, Alexandria, Va.

** How to Make an Atomizer [158]

Secure a good-sized test tube and fit it with a cork.  Take two glass tubes, with about 1/8-in. hole, and bend them as shown in the sketch.  This is done by heating them at the proper point over a gas flame until they are soft.  Two holes are bored through the cork and the bent tubes inserted in them, as shown in the sketch, so that one of the tubes will extend nearly to the bottom

[Illustration:  Atomizer]

of the test tube and the other just projecting through the cork.  The spray tube may be made with a fine hole by first securing a tube longer than necessary and heating it at the proper point and drawing the tube out into a fine thread.  The thread is broken off at the proper place to make a small hole.

** Home-Made Kits for the Camera [159]

If you have a 5- by 7-in. camera and wish to use some 4- by 5-in. plates, make a few simple kits to hold the smaller plates and fit the larger holders, says Camera Craft.  Take two pieces of pasteboard, A and B, black surfaced if possible, and exactly 5 by 7 in. in size.  The piece A will form the back of the kit and should have an opening cut in the center 4 by 5 in. in size.  Paste a piece of strong black paper, C, over the under side of it to keep the plate from falling through.  Cut an opening in the other piece, B, but cut it 1/4 in. shorter.  This opening, being 1/8 in. shorter at each end, will retain the plate in position and cut off only that small amount of plate surface when the plate is exposed in the

[Illustration:  Camera Kit]

camera.  Cut a piece of thin black cloth, D, 1 in. wide and 5 in. long.  Lay it down on a piece of newspaper and coat one side with gum or mucilage.  Stand the two pieces of 5 by 7 in. black cards on end together so that they will be square and true and bind the other ends with the strip of cloth so as to form a hinge.  The two cards form a thickness about equal to a thick glass plate, and go in the holder in the same way.  Lay one of these kits down against the ground side of the focusing screen and draw a line around, inside of the opening.  This will be a guide as to just what will be secured upon the smaller plate when the kits are used.