Laboratory Techniques Wall Chart, 75 x 100 cm Item Type_Tongs Standard rheostat with oxidized constantan

Standard rheostat with oxidized constantan winding on a vitreous-enameled steel tube and a heavy-duty sliding contact

silvered back with protective coating

the standard frequency for hearing-test calibration

Concave glass mirror at 75mm aperture and 75mm focal length

dimensioned to fit a pair of 75mm (3-inch) bar magnets and the keeper that bridges them while in storage

Laboratory Techniques Wall Chart, 75 x 100 cm Item Type_Tongs Standard rheostat with oxidized constantanReference wall chart illustrating core laboratory procedures, from measuring volumes and weighing on a balance to using a burner, distilling, filtering, pipetting, and titrating with a burette.