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
Junior Magnet Kit, A Kit Of Magnets And Accessories For Science Experiments, Each Of Square Iron, Aluminium, Zinc And Copper Metal, 1 Horseshoe Magnet With Keeper, 100mm 2 Ceramic Bar Magnets 75 mm Long. 3 Ceramic Ring Magnets, 38 mm Dia, Face Polarised.2 Plotting Compasses
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