Abstract
Increased dispersion and resolving power have made possible a revision and extension of previous work on the spectra of neon in the extreme ultraviolet. Lists of classified lines are given for Ne I, Ne II, Ne III and Ne IV in the range from λ2000 to λ282. No new lines were found for Ne I but the accuracy of the wave-lengths is considerably improved. For the other stages of ionization the number of lines identified or resolved has been doubled. Term tables are given for Ne II, Ne III and Ne IV including in them the results of other workers, notably de Bruin, from investigations in the more accessible portion of the spectrum.

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