Meter Stick Optical Bench Kit with Double Concave and Convex Lenses Material_Ceramic drawing both DC and AC

drawing both DC and AC simultaneously with short-circuit protection via a 0

and lead plugs for pump-plate connection during evacuation

Multiple adapter in borosilicate glass features two parallel necks with 24/29 sockets for connecting multiple components in chemistry apparatus

the flywheel light enough to drive by breath for hands-on reciprocating-engine study

4A rear-panel fuse

Meter Stick Optical Bench Kit with Double Concave and Convex Lenses Material_Ceramic drawing both DC and ACMeter stick optical bench with a hardwood rule, two lens holders, point source, candle mount, index card screen, and a matched pair of convex and concave lenses for image formation exercises.