Gravesande Ring and Ball, 19mm Ball Material_Neoprene 8-inch metal flywheel balanced on

8-inch metal flywheel balanced on a horizontal shaft with reference pointer and four wall-mount holes

sized for sustained workshop work where the smaller 25W and 65W irons can't keep heavy joints flowing solder

Student kit for constructing a working DC motor from component parts

Dual-edge metric graduations for horizontal reading on this hardwood meter stick

Used to demonstrate temperature-dependent resistance

Gravesande Ring and Ball, 19mm Ball Material_Neoprene 8-inch metal flywheel balanced onFlame heated thermal expansion demonstrator with a 19mm metal ball dropping through a matched ring when cool, no longer fitting once heating expands its diameter.