...I sawKoskoff start my cold apparatus toworking and then he quit, because heran out of helium... 
Various 「Astounding Stories of Super-Science, March 1930」
...Noknown terrestrial element gave such aline and he named the new elementwhich he deduced helium, from Helos,the sun...
Various 「Astounding Stories of Super-Science April 1930」
...The element helium was firstisolated by Ramsey some twenty-sevenyears later...
Various 「Astounding Stories of Super-Science April 1930」
...Three are due to hydrogen;two (discovered by Copeland) are helium lines; others are unknown...
George Forbes 「History of Astronomy」
...The helium line of the latter had never been noticed to bedouble...
Robert Stawell Ball 「The Story of the Heavens」
...c), the spectra of which are distinguished by the presence of brighthydrogen lines and the bright helium line D3...
Robert Stawell Ball 「The Story of the Heavens」
...Type B (Orion type, Helium stars)...
Carl Vilhelm Ludvig Charlier 「Lectures on Stellar Statistics」
...The helium lines have vanished...
Carl Vilhelm Ludvig Charlier 「Lectures on Stellar Statistics」
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