By still another application of the basting-ladle, or a walking-stick or umbrella, a bottle may be balanced upon a slack cord. All that is necessary is to insert the hook of the ladle-handle or the handle of the stick into the neck of the bottle and support upon the cord, as shown.
14.—THE REVOLVING COIN.
Bend up a piece of stiff wire, such as a hairpin, into the shape shown in the lower right-hand corner of Fig. 14, with a hook at one end and a clip at the other, the latter adjusted to grip a coin tightly. By hanging a fairly heavy finger-ring upon the hook as a counter-weight, the whole may be balanced with the penny upon the point of a needle, and made to revolve on it.
15.—THE REVOLVING PLATE.
A similar experiment may be performed on a larger scale by bending up a longer and proportionately stouter piece of wire, and substituting for the coin a small plate and for the ring a bunch of keys—Fig. 15—or a larger plate and a tea-cup. In the latter case the weight of the tea-cup may be built up to counter-balance the plate by dropping a number of coins one by one into the cup until the required weight is obtained.
16.—THE BALANCED WINE-GLASSES.
