** Window Shelf for Flower Pots [292]

On the ledge formed by the top part of the lower sash of the
window I fitted a board 7 in. wide into each side of the casing,
by cutting away the ends. I placed a small bracket at each end of
the shelf, so that it would fit solidly against the lower window
sash to support the weight of the plants.

[Illustration: Shelf in Window]

One of the brackets I nailed to the shelf and the other I held in
place with a hinge, the reason being that if both were solid, the
shelf could not be put on the window, as one end must be dropped
in place before the other. Such a shelf will hold all the plants a
person can put on it. When not in use, it can be removed without
marring the casing.
--Contributed by G. A. Wood, West Union, Ia.

** Magnet for the Work Basket [292]

Tie a ribbon or strong string to the work basket and fasten a
large magnet to the other end. Needles, scissors, etc., can be
picked up without any trouble. This device is very convenient for
invalids.
--Contributed by Nellie Conlon, Worcester, Mass.

** Knife Made from a Hack-Saw Blade [293]

A very serviceable knife with excellent cutting qualities can be
made easily from a discarded hack-saw blade. The dimensions given
in the sketch make a knife of convenient size.

The saw teeth are ground off on an emery wheel or grindstone to a
smooth edge parallel with the back edge. For the handle, take two
pieces of hard wood, dressing one surface of each piece, and cut a
groove as wide and thick as the saw blade. Place the blade in the
groove and glue the two dressed sides of the wood together. After
the glue has dried, the blade can be pulled out of the groove and
the wood shaped to any desired form. A small wood-screw is put
through one side of the handle to prevent the blade from sliding.
After completing the

[Illustration: Details of Handle]

handle, the blade is put back into the groove and sharpened to a
cutting edge.
--Contributed by H. A. Hutchins, Cleveland, Ohio.

** Killing Mice and Rats [293]

A simple and inexpensive means for killing mice and rats is to
leave yeast cakes lying around where they can eat them.
--Contributed by Maud McKee, Erie, Pa.

** Roller Coaster Illusion Traveling Up an Incline [293]

A toy car with a paddle wheel and a shaft on both ends traveling
upward on a chute in which water is flowing down, is shown in the
accompanying sketch. The paddle wheels travel in a rever