Faraday's Butterfly Net Type_Round End demonstrating mechanical-to-electrical energy conversion as

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

Alnico Grade III bar pair at 75 x 15mm with steel keepers in a cardboard box

Polypropylene round test tube rack holding 12 tubes — four at 25 mm and eight at 19 mm — with 360-degree access for benchtop chemistry demonstrations and student experiments

Glass-faced plotting compass in an aluminum case with a dial marked in principal points

Faraday's Butterfly Net Type_Round End demonstrating mechanical-to-electrical energy conversion asDemonstrates that charge resides only on the outer surface of a conductor by inverting the charged net inside out and showing the charge transferring to the new outside layer.