Sodium Chloride (NaCl) Crystal Lattice Model Kit Waves & Oscillation_Wave Motion demonstrating conservation of momentum and

demonstrating conservation of momentum and energy through ball-to-ball collisions

Two pith balls suspended on unspun silk from a brass pillar

Two-speed ticker timer kit printing 25 or 40 dots per second on paper tape via carbon discs

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Sodium Chloride (NaCl) Crystal Lattice Model Kit Waves & Oscillation_Wave Motion demonstrating conservation of momentum andSodium 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.