A reanalysis of the data reported in a previous paper has produced significant changes regarding the accuracy of electron densities measured from the widths of Stark-broadened neutral helium lines. This analysis indicates that, within the experimental errors of {~}×{}15%, electron densities measured from the broadening of the neutral helium lines, λ5016 {}and λ3889 {}, agree with those determined from hydrogen H_β. In addition to the previous measurements, shifts of λ3889 {} are presented and a tentative identification of the forbidden line (2¹S-3¹D, λ5042 {}) is made.
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Greig et al. (1970) studied this question.
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