...I developeda cold light under whoserays helium would liquefy and remainin a state of equilibrium until exposedto light rays... 
Various 「Astounding Stories of Super-Science, March 1930」
...This bit ofpower is carried into the helium tubes, and by a system of vacuumpower, is increased millions of times...
Various 「Astounding Stories of Super-Science, June, 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」
...It was full of bright lines of hydrogen, calcium, helium, andothers not identified...
George Forbes 「History of Astronomy」
...The quiescent prominences, whose elevation is often from forty thousand to sixty thousand miles, consist, as the spectroscope shows, mainly of hydrogen and helium...
Garrett Serviss 「Curiosities of the Sky」
...The cloud-like prominences consistmainly of hydrogen, with helium and calcium, while many metals arepresent in the eruptive discharges...
Robert Stawell Ball 「The Story of the Heavens」
...The helium lines have vanished...
Carl Vilhelm Ludvig Charlier 「Lectures on Stellar Statistics」
...Some twenty-five chemical elements have been found in meteorites, including carbon and the ``sun-metal,'' helium...
Garrett Serviss 「Curiosities of the Sky」
...Its spectrum shows that it is composedchiefly of hydrogen, calcium and helium, in the state of vapour...
Cecil G. Dolmage 「Astronomy of To-day」
...About a dozen less conspicuous lines were graduallyidentified in the spectrum of the prominences and the chromosphere,which appeared also to be caused by this same mysterious helium...
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」
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