...Itworks on the principle of the spectroscope with modifications... 
Various 「Astounding Stories of Super-Science, October, 1930」
...Birdclamped the gas-detecting spectroscope on the front of his cockpit andpeered through it...
Various 「Astounding Stories of Super-Science, October, 1930」
...Bird was already on his feet and was eagerly searching theground with the spectroscope which he had brought with him in thejump...
Various 「Astounding Stories of Super-Science, October, 1930」
..."We know from Mendeleff'stable that there are a number of elementswhich we have not discovered asyet, and several of the ones we knowwere first detected by the spectroscope...
Various 「Astounding Stories of Super-Science April 1930」
...Meanwhile the accumulation of facts has been prodigious, and therevelations of the telescope and spectroscope entrancing...
George Forbes 「History of Astronomy」
...The spectroscope has shown thatthese have also often the same velocity in the line of sight...
George Forbes 「History of Astronomy」
...The spectroscope reveals that Vega is a star probably only in itsinfancy, as hydrogen is its predominating element...
William Tyler Olcott 「A Field Book of the Stars」
...The prominences, however, although they were discovered during an eclipse, can now, with the aid of the spectroscope, be seen at any time...
Garrett Serviss 「Curiosities of the Sky」
...The light of the sun, sifted out by the spectroscope, shows all thecolours but not all the tints of the rainbow...
Richard A. Proctor 「Myths and Marvels of Astronomy」
...Let us now return to the sun-spots and see what the spectroscope canteach us as to their nature...
Robert Stawell Ball 「The Story of the Heavens」
...He proposed to effect this by using a spectroscope of greatdispersion, which would spread out the continuous spectrum considerablyand make it fainter...
Robert Stawell Ball 「The Story of the Heavens」
...the red hydrogen line—is in themiddle of the field of the viewing telescope, and then to open wide theslit of the spectroscope...
Robert Stawell Ball 「The Story of the Heavens」
...But what the telescope could not show, the spectroscope has latelydemonstrated in a most effective and interesting manner...
Robert Stawell Ball 「The Story of the Heavens」
...But the spectroscope is adequate to thetask, and it renders its analysis with an amount of evidence that isabsolutely convincing...
Robert Stawell Ball 「The Story of the Heavens」
...Thus the spectroscope enables us to find out the composition ofsubstances when they are reduced to vapour in the laboratory...
Cecil G. Dolmage 「Astronomy of To-day」
...In order to increase the power of a spectroscope, it is necessary toadd to the number of prisms...
Cecil G. Dolmage 「Astronomy of To-day」
...With regard to its chemical composition, the spectroscope shows us thatthirty-nine of the elements which are found upon our earth are also tobe found in the sun...
Cecil G. Dolmage 「Astronomy of To-day」
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