Laboratory Safety Chart, 30 x 40", with Roller Subcategory_Electricity and Circuits and lens-behavior studies

and lens-behavior studies

this 4-inch carbon-steel needle pivots on a brass cup bearing for low-friction rotation under the local field

5% accuracy with a 60mm scale

the shatter-resistant body splitting white light into spectral colors for safer per-desk dispersion work

supplying replacement bulbs for four-cell battery packs and the standard 6V ray-box and panel-lamp apparatus

Laboratory Safety Chart, 30 x 40", with Roller Subcategory_Electricity and Circuits and lens-behavior studiesPolyart plastic laboratory safety chart measures 30 x 40 inches with a mounted roller and color illustrations for classroom and lab wall display.