Expansion cloud chamber for observing the paths of α-rays. Cover and sidewall are of glass (Duran).
By compressing the attached rubber ball and then allowing it to expand, a supersaturated isopropanol-water mixture is produced in the cloud chamber. Following that, the paths of the α-rays revealed by droplet formation are visible for 1 – 2 seconds in the light of an optical lamp.
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![Universal Clamp, 1002830 [U13255], Clamps](/thumblibrary/U13255/U13255_01_140_140_Universal-Clamp.jpg)
![HF Patch Cord, 1m, 1002746 [U11255], Experiment Leads and Cables](/thumblibrary/U11255/U11255_01_140_140_HF-Patch-Cord-1m.jpg)
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![Calipers, 150 mm, 1002601 [U10071], Measurement of Length](/thumblibrary/U10071/U10071_01_140_140_Calipers-150-mm.jpg)
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![Pair of Experiment Leads, 75 cm, 2.5 mm², 1002850 [U13813], Experiment Leads and Cables](/thumblibrary/U13813/U13813_01_140_140_Pair-of-Experiment-Leads-75-cm-25-mm.jpg)
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for the experimental setup of tubes of series D, 1008507 [U191001], Accessories – Type D](/thumblibrary/U191001/U191001_01_140_140_Tube-Holder-D-for-the-experimental-setup-of-tubes-of-series-D.jpg)
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