It consists of a large board on which is mounted a low-voltage
electric pump, connected to 4 mm socket terminals, which circulates
the water through the circuit. The circuit is of lear plastic
tubing connected to glass tubes of different bores representing
resistances. Across the resistances is connected a detachable
manometer to show the potential difference. Following the
resistance is a taper ended tube discharging into a funnel
so that the rate of flow representing the current may be shown.
DimensionBoard 590 x 32 mm approx.
x 155 mm approx.