Here is a little after-dinner experiment requiring some delicacy of manipulation. The end in view is to balance three tumblers one upon the edge of the other as in Fig. 19. With two tumblers the experiment is comparatively easy: with the third it becomes a genuine test of skill.
20.—THE BALANCED SHOVEL AND TONGS.
A delicate test of balancing may be attempted with the shovel and tongs. The position of the two implements is shown in the illustration Fig. 20. The extremity of one arm of the tongs is rested against the inside of the shovel, and the other extremity is placed in the angle formed by the junction of the shovel with the handle. By delicate poising the two may be induced to remain in equilibrium in the position illustrated. A formation which permits of the tongs being engaged with the shovel after the manner shown is an important factor.
21.—A TOWER OF GLASS.
An effective combination is shown in Fig. 21. A carafe, partly filled with water to give stability, forms the basis of the structure. Upon this a trio of wine-glasses, lying horizontally, are arranged, and so held while the bottle, half filled with water, is placed in position above them. A little careful adjustment will secure an accurate reproduction of the experiment as illustrated.