MS-236 PVG CONDUCTIVITY APPARATUS, EDSER

Consist of five metal rods COPPER, BRASS, IRON, ALUMINUM and
ZINC of size 250 x 3 mm. length x diameter fitted vertically into the
base of cylindrical copper vessel 100 x 80 mm. height x diameter,
held by ring and boss for use on retort stand. Each rod with
movable index.