Take a bottle, with a cork in its neck, and place in it, in a
perpendicular position, a middle-sized needle. Fix a shilling into
another cork, by cutting a nick in it; and stick into the same cork
two small table-forks, opposite each other, with the handles inclining
outwards and downwards. If the rim of the shilling be now poised on
the point of the needle, it may easily be made to spin round without
falling, as the center of gravity is below the center of suspension.