Demonstration Spherometer Subcategory_Weights and Masses supplying an inert electrode that

supplying an inert electrode that conducts current without contributing its own ions to the cell reaction

the moderate curvature spreading light gently for divergence and virtual-image-formation work in refraction demos

the wider bore accepting full-size bar magnets while AC current drives the alternating field that rotates domains for demagnetization

fastened by two wide-pad stainless steel thumb screws under heavy torsional load

Demonstration Spherometer Subcategory_Weights and Masses supplying an inert electrode thatDemonstration spherometer with an oversized 133 mm dial head and baked enamel finish, letting an entire classroom read spherometer values before students work with benchtop units.