A good permanent stopper can be made by cutting a hollow rubber return ball in half, using one part with the concave side up.  It will fit the hole of any sink or bathtub.  One ball thus makes two stoppers at a cost of about 5 cents.

** Safety Tips on Chair Rockers [429]

Some rocking chairs are so constructed that when the person occupying it gives a hard tilt backward, the chair tips over or dangerously near it.  A rubber-tipped screw turned into the under side of each rocker, near the rear end, will prevent the chair from tipping too far back.

** How to Make a Toy Flier [429]

While a great many people are looking forward to the time when we shall successfully travel through the air, we all may study the problem of aerial navigation by constructing for ourselves a small flying machine as illustrated in this article.  A wing is made in the shape shown in Fig. 1 by cutting it from the large piece of an old tin can, after melting the solder and removing the ends.  This wing is then given a twist so that one end will be just opposite the other and appear as shown in Fig. 2.  Secure a common spool and drive two nails in one end, leaving at least 1/2 in. of each nail projecting after the head has been removed.  Two holes are made in the wing, exactly central, to fit on these two nails.  Another nail is driven part way into the end of a stick, Fig. 4, and the remaining part is cut off so the length will be that of the spool.  A string is used around the spool in the same manner as on a top.  The wing is placed on the two nails in the spool, and the spool placed on the nail in the stick, Fig. 5, and the flier is ready

[Illustration:  Homemade Flying Machine]

for action.  A quick pull on the string will cause the wing to leave the nails and soar upward for a hundred feet or more.  After a little experience in twisting the wing the operator will learn the proper shape to get the best results.

Be very careful in making the tests before the wings are turned to the proper shape, as the direction of the flier cannot be controlled and some one might be injured by its flight.

** How to Make an Ironing-Board Stand [429]

Secure some 1 by 3-in. boards, about 3 ft. long, and plane them smooth.  Cut the two pieces A and B 30 in. long and make a notch in each of them, about one-third of the way from one end, 1 in. deep and 3 in. long.  These

[Illustration:  Ironing-Board Stand]

notches are to receive the piece D, which has a small block fastened to its side to receive the end of the brace C. The brace C is 36 in. long.  The upper ends of the pieces A, B and C are fastened to a common ironing board by using iron hinges as shown in Fig. 1.  As the piece D is fitted loosely, it may be removed and the brace, C, with the legs, A and B, folded up against the board.  —­Contributed by Bert Kottinger, San Jose, Cal.

** A Home-Made Electric Plug [430]