Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom and follicles on a mounted

and follicles on a mounted base for dermatology teaching

Four-cell D-size holder in unbreakable plastic with curved retention sides

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

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

Single-Phase Rheostat, Classroom Grade Lab Supplies_Classroom and follicles on a mountedHundred ohm 1. 75A single phase rheostat with cover protected constantan winding on a 200x56mm tube and 4mm safety socket terminals, with plus or minus 10% nominal value tolerance.