Oscilloscope, Model EI-803, 30 MHz Material_Rubber and a tensioning pulley

and a tensioning pulley

allowing a sodium or filament lamp to be aimed precisely onto a spectrometer slit or refraction-cell setup

Free-standing plant cell model displays greatly magnified organelle detail for student-directed rotation and inspection in cell biology coursework

Universal 2-input NOR gate module with red/green LED outputs and a printed truth table

porous inner pot

Oscilloscope, Model EI-803, 30 MHz Material_Rubber and a tensioning pulleyHigher bandwidth 30 MHz dual channel oscilloscope, the next step instrument up from the 15 MHz EI 800 for AC signal, waveform, and frequency response work in advanced classrooms.