[Illustration]
A simple experiment for impromptu performance at the table can be made
with a couple of pins and a coin. The accomplishment consists of picking
up the coin by two opposite edges between the points of the two pins, as
in Fig. 23, in which position it may, with steady hands, safely be held.
By blowing smartly upon one edge of the coin it may be made to rapidly
revolve between two points. The feat has the appearance of an exhibition
of considerable skill, but, as a trial will show, it is in no way
difficult of execution. The selection of a milled-edged coin will
facilitate the matter.