A Mighty Voice
A prophet is never without honor but in his own country, and few of your acquaintances will believe you to be such a wonderful person that with a single shout you can break a glass. Yet it is very easy to convince them.
Take an ordinary wine-glass, and hold it by its foot firmly to the table. Make the glass ring with a touch of the finger (it will probably sound a rather low note). While the glass is yet tingling, raise it rapidly to your mouth, and shout the same note that it rang full into the bowl with all your force. The chances are ten to one that the glass will shiver to pieces.
The reason of this phenomenon is the vibrations caused by the tingling are so suddenly increased by the strength of your voice that the glass is unable to bear the strain, and therefore breaks.
A Genuine Match
It is surprising how universal is the law of love! Even two plain pieces of wood are unable to resist the impulses of the great passion.
Take out the bottom of a match-box, and split it into two pieces. Double over the ends at about a quarter of the way up, as in [Fig. 16]. On one piece make the rough sketch of a girl, and upon the other a similar drawing of a man, and then place the pieces together, as shown in the illustration.
Fig. 16.—Drawings in position.
If you pour a few drops of water over the joints of the two pieces of wood, you will find that the two figures slowly and surely rise up to meet each other, and will eventually press their two faces closely in a long kiss. They may be some time about it, but then pleasures delayed are always doubly enjoyable!