Copper-Iron Thermopile Lab Supplies_Tongs holding twelve tubes up to

holding twelve tubes up to 22 mm diameter for classroom and professional bench setups

and surrounding bone for dental

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

and electromagnet to map mechanical/electrical/light/heat conversions

sized to mount alongside a tone generator for converting electrical signals into audible tones during sound-wave demonstrations

Copper-Iron Thermopile Lab Supplies_Tongs holding twelve tubes up toSeven junction copper and iron thermopile from four 130mm wires of each metal, the series arrangement amplifying the Seebeck voltage for radiant heat detection experiments.