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Appendix A Electrometers
Al A Study of a Quadrant Electrometer
Appendix B The Production of Vacua
5 other sections not shown
absorption coefficient accelerating potential Actinium active alpha particles alpha rays aluminum Amplifier angstroms anode apparatus applied atomic weight beam beta rays calibrated capillary cathode rays centimeters chamber charge to mass circuit Compute condensation pumps condenser connected copper curve deflection discharge distance elec electricity electrometer electrons electroscope emanation emission emitted evacuated experiment fiber fore pump gamma rays gases gauge glass half period heated helium hole hot filament hydrogen intensity ionizing potential leaf light liquid air low pressures magnetic field McLeod gauge measured mercury vapor metal meter method molecules natural leak needle potential negative observed obtained oxygen pass plate current Plot positive ions produced quadrant radiation radioactive radioactive substance radium range remove resistance screen sealed shown in figure stop cock temperature thick Thorium three-electrode tion uranium uranium Xi vacuum system vacuum tube various velocity voltage voltmeter volts water vapor wave-length wire X-rays