Word: argonant
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...first Dr. Jones had to measure the blood flow by holding a Geiger counter over the muscle of a subject who had inhaled a radioisotope of an inert gas such as krypton or argon. That was expensive and took a long time. Now, by measuring the carbon dioxide generated in muscles during exercise, Dr. Jones can get his answers in a few minutes...
...Composition of ordinary air by volume: 78.03% nitrogen, 20.98% oxygen, .94% argon, .03% carbon dioxide, .02% other gases...
Western Union calls its lamp a "concentrated arc." Inside a small glass bulb filled with argon gas are two electrodes. On one is a tiny speck of zirconium oxide. When the current flows, this turns to molten zirconium metal, glows ten times as brightly for its area as the brightest tungsten filament...
...mercury "bomb" is spot-welded to one cathode and is exploded by heat applied just before the fluorescent tube is sealed, thus releasing mercury vapor into the argon-filled lamp. Twofold result, claimed by Hygrade Sylvania: 1) stable performance of every tube; 2) savings of up to 50% of mercury previously wasted...
TIME, Oct. 23, p. 14, ". . . [John Nance Garner's] Neon-blue eyes. . . ." If you will check the spectrum of Neon you will find it emits mostly orange and red wavelengths of light. Mercury or argon are the usual sources of blue light used in signs...