Alnico U-Shape Magnet, 50 x 10 x 9mm Pack Size_Single where colored liquid in a

where colored liquid in a U-shaped section shifts measurably as air blown through a constricted glass tube creates pressure differences

Two-speed ticker timer kit printing 25 or 40 dots per second on paper tape via carbon discs

Pivoted needle-style electroscope that swings on its axis when a charge is applied

and lead with densities from 2

Regulated dual AC/DC power supply displaying voltage and current on independent digital readouts

Alnico U-Shape Magnet, 50 x 10 x 9mm Pack Size_Single where colored liquid in aUsed to demonstrate field concentration across a small pole gap, this 50 x 10 x 9mm Alnico U shape carries an 18mm gap and ships with a keeper for storage between investigations.