Demonstration Meter Included_Rod letting instructors tailor voltage to

letting instructors tailor voltage to light sources and experiment-specific requirements

Acrylic bell-in-vacuum jar with an internal 4-6V DC electric bell that fades and falls silent as the enclosed air is removed

used to extend the activity-series comparison and to introduce the chemistry of the lead-acid battery

and pendulum period in physics experiments

and organelles with hand-painted detail on a mounted base for biology teaching

Demonstration Meter Included_Rod letting instructors tailor voltage toPermanent magnet moving coil meter mounted in a transparent wooden box with all internal electrical connections visible, sized so students can see the moving coil mechanism while it reads.