7D30.08 Counting Statistics
7D30.10 Nixie Geiger Counter
7D30.20 Alpha Detector
7D30.30 Magnetic Deflection of Beta Rays
7D30.60 Diffusion Cloud Chamber *PIRA 200*
7D30.61 Water-Cooled Diffusion Cloud Chamber
7D30.90 Model Mass Spectrometer
