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Home > Category Index for Science Quotations > Category Index F > Category: Fluorescence

Fluorescence Quotes (3 quotes)

I am almost inclined to coin a word and call the appearance fluorescence, from fluor-spar, as the analogous term opalescence is derived from the name of a mineral.
Footnote in 'On The Change of Refrangibility of Light', Philosophical Transactions of the Royal Society of London (1852), 142, 479. From the mineral fluor-spar, Humphry Davy named fluorine. The mineral, now called fluorite (calcium fluorite), was named was by Georg Agricola in 1546. The German flusse, flow, was applied because it melts easily, and is now important as a flux.
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I feel like a white granular mass of amorphous crystals—my formula appears to be isomeric with Spasmotoxin. My aurochloride precipitates into beautiful prismatic needles. My Platinochloride develops octohedron crystals,—with fine blue florescence. My physiological action is not indifferent. One millionth of a grain injected under the skin of a frog produced instantaneous death accompanied by an orange blossom odor. The heart stopped in systole. A base—L3H9NG4—offers analogous reaction to phosmotinigstic acid.
In letter to George M. Gould (1889), collected in Elizabeth Bisland The Writings of Lafcadio Hearn (1922), Vol. 14, 89.
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I have a peculiar theory about radium, and I believe it is the correct one. I believe that there is some mysterious ray pervading the universe that is fluorescing to it. In other words, that all its energy is not self-constructed but that there is a mysterious something in the atmosphere that scientists have not found that is drawing out those infinitesimal atoms and distributing them forcefully and indestructibly.
Quoted in 'Edison Fears Hidden Perils of the X-Rays', New York World (3 Aug 1903), 1.
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Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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