Racing Rings consists of three rods one each of copper, aluminum and PVC, Ring magnet is dropped down the PVC rod, it falls unobstructed, Two metal rods create an induced magnetic field to that adds resistance to the rings travel, metals are different, they fall at different rates
Ice Buckets/Pan made polyurethane foam, good insulating property. Suitable to use with Dry- Ice with Isopropyl Alcohol, Water- Ice with salt slurry or liquid nitrogen. Temp: -76degreeC to 70degreeC. Poring lip for easy drining, Lids can be stacked below bucket/pan.
Spectrum Tubes Deuterium, glass tubes approximately 10-1/4in (260mm) long, central capillary portion approximately 3-1/2in to 4in (90-100mm) long with electrodes sealed at both ends and connected to lead wires protected by metal caps.
Jolly bulb metal - superior, Palm-sized, hollow metallic ball with a manometer connected to it for demonstrating change of pressure in a closed volume of air when heated or cooled, 80 mm diameter
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