Division of Attention Board

The division of attention board consists of a wooden board with
a circular and triangular groove with a metallic contact point on
each.The board is wired inside so that any passage of electric
current on it from a battery can be recorded on an impulse
counter. The board is connected as its terminal to a battery.The
other terminal of the battery is connected to a metallic stylus
through an, impulse counter. Whenever the stylus passes through
the metallic contact point the counter would record once.