1. The board is hollow, the top being made
of thin veneer (Fig. 2). A small magnet, A, is connected to a
small flat pocket lamp battery, B. The board is suspended by four
lengths of picture-frame wire one of which, E, is
[Illustration: Wax Hand on Board and Electrical Connections]
connected to the battery and another, D, to the magnet. The other
wires, F and G, are only holding wires. All the wires are fastened
to a small ornamental switch, H, which is fitted with a connecting
plug at the top. The plug can be taken out or put in as desired.
The top of the board must be made to open or slide off so that
when the battery is exhausted a new one can be installed.
Everything must be firmly fixed to the board and the hollow space
filled in with wax, which will make the board sound solid when
tapped.
In presenting the trick, the performer gives the hand and board
with wires and switch for examination, keeping the plug concealed
in his right hand. When receiving the board back, the plug is
secretly pushed into the switch, which is held in the right hand.
The hand is then placed on the board over the magnet.
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