Stout-Walled Thistle Funnel, 30cm, Borosilicate Glass Entomology & Zoology_Entomology Supplies Pith balls suspended both inside

Pith balls suspended both inside and outside a charged metal cylinder make visible proof that electrostatic charge resides only on the outer surface of a conductor

this 18 SWG bare constantan wire on a 125g reel relies on the alloy's low temperature coefficient

Two independent output channels on this compact AC/DC power supply deliver six selectable voltages up to 12V at 500 mA each

Used to step a class through wave superposition and beat frequencies

Stout-Walled Thistle Funnel, 30cm, Borosilicate Glass Entomology & Zoology_Entomology Supplies Pith balls suspended both insideStout walled thistle funnel in borosilicate glass measures 30cm with thick construction for controlled liquid addition in chemistry procedures.