Description

used as the standard positive partner to ebonite in triboelectric investigations

Plastic-resin Hall's carriage at 5

Used as the positive-rail counterpart to the long black lead

Glass-flask leaf electroscope with a brass rod and aluminum leaf

Cast Iron Stump Base, 2.3", Black Entomology & Zoology_Dissection used as the standard positiveCast iron stump base with a black chemical resistant coating, 2. 3 inches wide and 1. 75 inches tall, supporting 13 mm rods for compact small scale laboratory stand setups.

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Cast Iron Stump Base, 2.3", Black Entomology & Zoology_Dissection used as the standard positive

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