Wooden Frame Abacus, 5 Steel Wires Subcategory_Temperature and Heat Eleven-ohm 5A air-cooled rheostat with

Eleven-ohm 5A air-cooled rheostat with constantan winding on a 300x44mm vitreous-enameled steel tube and a slide-bar carriage carrying a phosphor-bronze contact

providing an inert electrode that lets students isolate electrolyte and ion behavior from electrode chemistry

Element-stamped 20mm solid tin cube marked (Sn)

Three-hundred-thirty-ohm 0

Used to demonstrate temperature-dependent resistance

Wooden Frame Abacus, 5 Steel Wires Subcategory_Temperature and Heat Eleven-ohm 5A air-cooled rheostat withWooden framed abacus with five steel wires and 20 beads per wire on a 13. 5 by 9. 5 inch base, a smaller range counting tool for introductory arithmetic and place value work.