Thermo-Hygrometer, 85mm Diameter Type_Puzzle Kit supplying two voltmeter scales on

supplying two voltmeter scales on one accessory so students switch between low and mid-cell voltages without rewiring

Twelve-ball drilled set in a foam-lined plastic case with two each of aluminum

Mid-sized brass cylinder on an ebonite-insulated base

controllable flame shape during laboratory heating

Heavy-base Bunsen burner adds stopcock gas control for fine flame adjustment during chemistry experiments with liquid propane or butane fuel

Thermo-Hygrometer, 85mm Diameter Type_Puzzle Kit supplying two voltmeter scales onCombined thermo hygrometer on an 85 mm metal dial pairing a 10 to 50C thermometer with a 0 to 100 percent hygrometer for single glance monitoring of room and laboratory conditions.