The Distribution of Intensity in the Broadened Balmer Lines of Hydrogen

The intensity distribution across the broadened Balmer lines of hydrogen Hß, Hγ and Hδ excited by condensed discharges for a pressure range from 48 to 250 mm. of mercury was determined by photographing the spectra through a neutral wedge. The broadening was symmetrical and the general form of the intensity curve was convex to the axis of wave-lengths; the curves for each line gave evidences of structure characteristic of the line