343-Piece Giant Molecular Model Set, 99 Atoms Included_Stopcock used to demonstrate charging by

used to demonstrate charging by induction and repeated transfer of charge

its sectioned carburetor and fuel supply exposing the compression-ignition cycle to a hand-cranked turnover

supplied with two 5-inch insulated-handle pointer electrodes

free of magnetic-core saturation effects for AC circuit

this metal helix lets stairwell-scale wave-propagation experiments amplify the visibility of standing waves

343-Piece Giant Molecular Model Set, 99 Atoms Included_Stopcock used to demonstrate charging byWhole class visible giant molecular model set with 99 atoms 1 2 inches in diameter and 343 total pieces including double bond, turning, and connector links for back of the room demonstrations.