Conical Conductor, 15 x 8cm Subcategory_Clamps and Bossheads Pocket-sized 45mm aluminum compass with

Pocket-sized 45mm aluminum compass with a graduated dial

Front glass window slides up to allow insertion of ionizing material in chamber

and mixed autotrophic-heterotrophic characteristics for protist biology teaching

with both 4mm stackable sockets and screw terminals so leads wire in without an adapter to either bench standard

compatible with dilute acids

Conical Conductor, 15 x 8cm Subcategory_Clamps and Bossheads Pocket-sized 45mm aluminum compass withLarger brass conductor cone on an insulated rod and base, paired with sphere and cylinder counterparts to extend the electrostatic curvature comparison up the size scale.