Silk Cloth Square for Static Demonstrations, 12 x 12" Entomology & Zoology_Entomology Supplies holding volume constant across specimens

holding volume constant across specimens for isolated density comparisons

Four-part plant cell model lifts chloroplast

05A coil for the demountable transformer with 445 ohm resistance and 4mm panel sockets

this enhanced optical bench set ships with a lamp housing and a matched complement of optical components

Silk Cloth Square for Static Demonstrations, 12 x 12" Entomology & Zoology_Entomology Supplies holding volume constant across specimensUsed to draw electrons from glass and ebonite rods during rubbing, this silk square gives friction rods a strong positive charge for triboelectric and electrostatic demonstrations.