Rings and Swing
This trapeze, with rings for the large boys and a swing for the smaller ones, can be made on the same standards. Instead of the usual two short ropes, tied and bolted through the top crosstimber bore two holes large enough for the ropes to pass through easily. Pass the rope along the crosspiece and down the post and tie it to cleats nailed at a height that can be easily reached.
At the ends of the crosspiece drive two nails, allowing them to project 1 or 2 in. This will keep the rope from slipping off when the rings and swing are raised and lowered. All sharp edges should be sandpapered to prevent the rope from being cut. A board with notches cut in the ends will make a good swing board which can be removed instantly.
Contributed by W. A. Jaquythe, Richmond, Cal.
Homemade Telegraph Key
Key and Connections
A piece of wood, 1/2 in. thick, 2 in. wide and 5 in. long, is used for the base of this instrument. Two wire nails, each 1 in. long, are used for the cores of the magnets. Each nail is wound with three or four layers of fine insulated magnet wire, about No. 25 gauge, similar to that used in electric bells, leaving about 1/4 in. of the end bare so that they may be driven into the wood base. The connections for the coils are shown in the sketch, at A.