Lens Holder for 50mm Diameter Lens or Mirror Subcategory_Microscopes Improved-design superior induction coil producing

Improved-design superior induction coil producing a 30mm spark on a molded plastic base

Hand-cranked Van de Graaff generator with a 9

5V replacement element so wet-cell demonstrations stay running once the original electrolyte loses charge capacity

One-volt DC scale on a 315x115mm laminated panel with sealed multiplier

stacking lenses the optical principle driving each additional power boost

Lens Holder for 50mm Diameter Lens or Mirror Subcategory_Microscopes Improved-design superior induction coil producingVersatile holder accepting either a 50mm diameter lens or mirror, the dual purpose mount giving optics setups one fewer accessory to track across reflection and refraction experiments.