The mobility of ions in air

摘要: In a previous paper I have described an experimental method of measuring ion mobilities in gas, which yields accurate values for both upper and lower limits distribution range, from one can also derive curve showing the general shape band, with calculable resolving power. It was found that negative ions dry air at normal pressures had ranging 2∙15 to 1∙45 cm. per second volt centimetre, while band showed peak value about 1∙8 sharp limit 2∙15. There some reason believe presence water vapour narrowed, faster being eliminated manner by other observers, slower remaining comparatively unaffected. experiments here described, improved form apparatus is used study greater detail effect vapours on mobility distribution, positive air.