“The properties of the air are such that it may become condensed or rarefied.”

— Leonardo Da Vinci

The Notebooks of Leonardo Da Vinci (1938), XVII Flight

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Leonardo Da Vinci 363

Italian Renaissance polymath 1452–1519

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“Blockbusters are the exception, not the rule, and yet we see an entire industry through their rarefied air.”

Chris Anderson book The Long Tail

Source: The Long Tail: Why the Future of Business Is Selling Less of More (2006), Ch. 9, p. 167

“Since the wings are swifter to press the air than the air is to escape from beneath the wings the air becomes condensed and resists the movement of the wings; and the motive power of these wings by subduing the resistance of the air raises itself in a contrary movement to the movement of the wings.”

Leonardo Da Vinci (1452–1519) Italian Renaissance polymath

The Notebooks of Leonardo Da Vinci (1938), XVII Flight

“Alternate currents, especially of high frequencies, pass with astonishing freedom through even slightly rarefied gases. The upper strata of the air are rarefied. To reach a number of miles out into space requires the overcoming of difficulties of a merely mechanical nature.”

Nikola Tesla (1856–1943) Serbian American inventor

"Experiments With Alternate Currents Of High Potential And High Frequency" http://www.tfcbooks.com/tesla/1892-02-03.htm an address to the Institution of Electrical Engineers, London (February 1892)

“Now present here, the future takes its time.
The brittle insect scrapes at the dry loam;
All is burnt up, used up, drawn up in air
To some ineffably rarefied solution...
Life is enlarged, drunk with annihilation,
And bitterness is sweet, and the spirit clear.”

Paul Valéry (1871–1945) French poet, essayist, and philosopher

Ici venu, l'avenir est paresse.
L'insecte net gratte la sécheresse;
Tout est brûlé, défait, reçu dans l'air
A je ne sais quelle sévère essence . . .
La vie est vaste, étant ivre d'absence,
Et l'amertume est douce, et l'esprit clair.
As translated by by C. Day Lewis
Charmes ou poèmes (1922)

“If one of these elements, heat, becomes predominant in any body whatsoever, it destroys and dissolves all the others with its violence. …Again if too much moisture enters the channels of a body, and thus introduces disproportion, the other elements, adulterated by the liquid, are impaired, and the virtues of the mixture dissolved. This defect, in turn, may arise from the cooling properties of moist winds and breezes blowing upon the body. In the same way, increase or diminution of the proportion of air or of the earthy which is natural to the body may enfeeble the other elements.”

Vitruvius book De architectura

Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book I, Chapter IV, Sec. 6

“The condensation of all property in the hands of one individual is an economic catastrophe-something like the formation of a black hole in astrophysics. It's obviously bad news for the majority of the people, who are left penniless. But even if you happen to be the big winner, your victory may prove hollow. Although you have all the riches in the world, you can't buy a thing, because no one else has goods to sell.”

Brian Hayes (scientist) (1900) American scientist, columnist and author

Source: Group Theory in the Bedroom (2008), Chapter 3, Follow The Money, p. 47

“As a man is said to have a right to his property, he may be equally said to have a property in his rights.”

James Madison (1751–1836) 4th president of the United States (1809 to 1817)

“They too, like so much that to the common eye seems solid, may melt into air, into thin air.”

James Frazer book The Golden Bough

Source: The Golden Bough (1890), Chapter 69, Farewell to Nemi
Context: In the ages to come man may be able to predict, perhaps even to control, the wayward courses of the winds and the clouds, but hardly will his puny hands have strength to speed afresh our slackening planet in its orbit or rekindle the dying fire of the sun. Yet the philosopher who trembles at the idea of such distant catastrophes may console himself by reflecting that these gloomy apprehensions, like the earth and the sun themselves, are only parts of that unsubstantial world which thought has conjured up out of the void, and that the phantoms which the subtle enchantress has evoked to-day she may ban to-morrow. They too, like so much that to the common eye seems solid, may melt into air, into thin air.

“Water belongs to us all. Nature did not make the sun one person's property, nor air, nor water, cool and clear.”
Usus communis aquarum est. Nec solem proprium natura nec aera fecit nec tenues undas

Ovid Metamorphoses

Book VI, 349-351; translation by Michael Simpson https://books.google.ca/books?id=hDPmwbCSSPEC
Metamorphoses (Transformations)

“Titles of property, for instance railway shares, may change hands every day, and their owner may make a profit by their sale even in foreign countries, so that titles to property are exportable, although the railway itself is not.”

Karl Marx (1818–1883) German philosopher, economist, sociologist, journalist and revolutionary socialist

Vol. II, Ch. X, p. 215.
(Buch II) (1893)

“The properties of the air are such that it may become condensed or rarefied.”

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Leonardo Da Vinci 363

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