Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves 5V to demonstrate the wet-cell

5V to demonstrate the wet-cell ancestor of the modern dry battery in early electrochemistry units

the slim half-disc geometry letting beams enter the curved face along its radius for clean refraction-angle and TIR observations

375-inch rubber drive belt for the motor-driven Van de Graaff generator

supporting 18 mm thermometers upright and protected between laboratory uses

and one 1 kg mass with a 0

Real Coal Specimen Set with Cotton Bag, 5-Piece Lab Supplies_Sieves 5V to demonstrate the wet-cellBundled in a cotton drawstring bag with a linked crystal growing activity, this pack of five small lumps of genuine American anthracite coal doubles as novelty and classroom specimen.