Air-Cooled Rheostat, Model C Glass Bottles_Reagent Bottles Twin drivers rated 5W and

Twin drivers rated 5W and 8W share a 28 x 10 x 10cm wooden enclosure with independent coaxial-to-4mm connections

One-inch brass ball that threads onto a pendulum string as a heavier metal counterpart to aluminum or steel balls in mass-dependent periodic-motion investigations

Large-scale typical flower model with removable floral parts and a bisected ovary showing internal ovule arrangement for detailed botany instruction

Thousand-turn main coil on an insulated bobbin with 4mm socket terminals

Air-Cooled Rheostat, Model C Glass Bottles_Reagent Bottles Twin drivers rated 5W andAir cooled rheostat with extended tube ventilation, dissipating heat across the slide bar carriage during sustained high current circuit work in physics laboratory demonstrations.