Gunther Expansion Apparatus, Brass Waves & Oscillation_Sound & Resonance the lower-forward-voltage counterpart to the

the lower-forward-voltage counterpart to the silicon unit for radio-detection demonstrations

Spanning C (256 Hz) through C (512 Hz) in scientific pitch

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

3 glass barometer tube at 35 inches long with an integrated bulb

Momentary-contact push-button switch on a base with two 4mm terminals

Gunther Expansion Apparatus, Brass Waves & Oscillation_Sound & Resonance the lower-forward-voltage counterpart to theGlass jacketed twin rod Gunther expansion apparatus with 0. 01mm spherometer and electrical contact trigger, supplied with copper, brass, and iron rods for precise expansion measurement.