...But it is interesting to recall that our scientists recentlyproposed to send a similar signal from Earth to Mars by firing atremendous flare of magnesium... 
Various 「Astounding Stories of Super-Science, November, 1930」
...Occasionally, too, the magnesium in the solaratmosphere (over certain limited regions only, be it remembered) hasbeen known to behave in this manner...
Richard A. Proctor 「Myths and Marvels of Astronomy」
...We mayalso mention a third substance, magnesium, which burns with a brilliantwhite light, eminently characteristic of the metal...
Robert Stawell Ball 「The Story of the Heavens」
...The three metals, strontium, sodium, and magnesium, may thus beidentified by the colours they produce when incandescent...
Robert Stawell Ball 「The Story of the Heavens」
...b the hydrogen lines and the few metallic lines are of equal breadth,and the magnesium line just mentioned is the strongest of all...
Robert Stawell Ball 「The Story of the Heavens」
...The vapour of iron is there, the vapour of sodium, magnesium, andso on...
Richard A. Proctor 「Myths and Marvels of Astronomy」
...We may mention calcium, iron, hydrogen, sodium,carbon, nickel, magnesium, cobalt, aluminium, chromium, strontium,manganese, copper, zinc, cadmium, silver, tin, lead, potassium...
Robert Stawell Ball 「The Story of the Heavens」
...The hydrogen lineswere very conspicuous, while the iron lines were very numerous, andcalcium and magnesium were also represented...
Robert Stawell Ball 「The Story of the Heavens」
...It appears that there is decisive evidenceof the presence in this luminary of many elements known to exist in ourown sun; amongst others are found sodium, magnesium, calcium, iron, andbismuth...
Richard A. Proctor 「Half-hours with the Telescope」
...Thelines marked C and F are produced by hydrogen, which isone of the constituents of water, E shows calcium to bepresent in the sun, b magnesium, etc...
George C. Comstock 「A Text-Book of Astronomy」
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