Optically Pure Air

Some articles on air:

John Tyndall - Main Scientific Work
... studied the action of radiant energy on the constituents of air, and it led him onto several lines of inquiry, and his original research results included the following Tyndall ... the atmosphere and is the principal gas controlling air temperature ... In the investigations on radiant heat in air it had been necessary to use air from which all traces of floating dust and other particulates had been removed ...

Famous quotes containing the words air and/or pure:

    My companion and I, having a minute’s discussion on some point of ancient history, were amused by the attitude which the Indian, who could not tell what we were talking about, assumed. He constituted himself umpire, and, judging by our air and gesture, he very seriously remarked from time to time, “you beat,” or “he beat.”
    Henry David Thoreau (1817–1862)

    Nothing is accidental in the universe—this is one of my Laws of Physics—except the entire universe itself, which is Pure Accident, pure divinity.
    Joyce Carol Oates (b. 1938)