A pack of 12 in plastic case.
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A plastic disc 16 cm diameter in wooden base, a brass nickel plated 100 mm dia plate with ebonite handle & a small brass contact sphere.. Electrophorous
Electroscope Pith Ball for Physics Lab A chrome plated brass pillar mounted on a wooden base with 2 pith balls spheres on unspun silk.
A plastic vessel, with removable metal internal & external coatings. H x dia 100 x 75 mm approx.; inner metal coating in form of inverted cup to which a rod is fixed.
Conical : made of brass, nickel plated,. 100 x 50 mm in size, mounted on insulated metal stand with tripod base.
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