Copper-Iron Thermopile Lab Supplies_Tongs reconfiguring the demonstration meter as

reconfiguring the demonstration meter as a low-voltage voltmeter for single-cell and battery-pack readings

Clear-coated wooden A-ramp at 17 inches long paired with a double-ended cone roller that appears to travel uphill while its center of mass actually descends along the diverging rails

showing equal pressure transmission across different piston areas

sized to accept a bell jar for atmospheric-pressure and vacuum demonstrations

Copper-Iron Thermopile Lab Supplies_Tongs reconfiguring the demonstration meter asSeven junction copper and iron thermopile from four 130mm wires of each metal, the series arrangement amplifying the Seebeck voltage for radiant heat detection experiments.