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Plain ruling
Each ball measures 13
Set of 20 See and Solve Number Puzzles in one giant bumper pack
the reusable vinyl material
design to be clearly visible
Cloud Chamber Clearance Plain rulingThis large cloud chamber allows the visualization of atomic particles as they pass through a super saturated Isopropanol vapour, cooled by dry ice. Energetic charged particles collide with the gas molecules causing a trail of ionized particles. These ionized gas particles act as nucleation sites on which the super saturated alcohol vapour condenses, leaving a cloud like trail that lasts for a few seconds. The built in LED lighting is collimated to