The Astrophysical journal . s-term; and I have found thesame to be true for the distance of the maximum intensity from thestationary line. Within a series-term, therefore, the distribution ofintensity of the Doppler effect is the same for all components; accord-ing to § 13 the intensities of the components of a series-term vary in aconstant ratio; this is independent of the square of the speed. A comparison of the last two columns of Table X shows thatwithin the series-term the ratio of the displaced to the stationaryintensity is constant; the intensity of the line 2967 with which theothers ar
The Astrophysical journal . s-term; and I have found thesame to be true for the distance of the maximum intensity from thestationary line. Within a series-term, therefore, the distribution ofintensity of the Doppler effect is the same for all components; accord-ing to § 13 the intensities of the components of a series-term vary in aconstant ratio; this is independent of the square of the speed. A comparison of the last two columns of Table X shows thatwithin the series-term the ratio of the displaced to the stationaryintensity is constant; the intensity of the line 2967 with which theothers are compared is taken as unity. It has been found by Kiich and Retschinsky1 that on varying theload (temperature, vapor-pressure) of a mercury lamp the lines 5461,4359, and 4047 increase and decrease in a constant ratio. Thesethree lines are the components of the first term of the second subor-dinate series of mercury. They find the same phenomenon in the 1 Annalen der Physik, 20, 563, 1906. I«2 /. STARK TABLE X Wave-Length. Width FirstOrder Width Sec-ond Order DisplacedIntensity 458 969 2 429 921949 3 10 436 998 4 432 995 3 438 977 1 StationaryIntensity case of the lines at XX 6908, 6234, 5790, 4348, and 4078. We maytherefore conclude that these lines represent the components of oneand the same series-term (§6). The preceding results suggest the following generalization andhypothesis. In any one term of a spectral series the distribution ofintensity among the components is independent of the mode ofexcitation; but the absolute intensity of any component (and henceof all the other components), or the absolute intensity of the entireterm, is a function of the mode of excitation (speed of canal rays,temperature). When viewed from an energy standpoint, or withreference to the amplitude of acceleration in the source of emission,the components of a series-term appear to be connected in some wayin the ion. It may be noted, in passing, that this relation between the com-ponents of a
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