Rod with cross bar

Set of four 4 oz bottles of mineral oil, for use with the Millikan Oil Drop Apparatus.

Combines features that significantly improve the ease of setup, the durability of the Torsion Band and the quality of results. In the newer models the spheres are tungsten rather than lead.

Replacement torsion bands for the Gravitational Torsion Balance (AP-8215A).

Allows the students observation of velocity of drop rising in an electric field, then permits calculation of the force on the charge carried by the oil drop.