Oath of the four Grant children, first used in Ch. 2 : And Continues
The Ship that Flew (1939)
“I think we must allow that dephlogisticated air is in reality nothing but dephlogisticated water, or water deprived of its phlogiston; or, in other words, that water consists of dephlogisticated air united to phlogiston; and that inflammable air is either pure phlogiston, as Dr. Priestley and Mr. Kirwan suppose [and as Cavendish formerly supposed], or else water united to phlogiston; since, according to this supposition, these two substances united together form pure water. On the other hand, if the first explanation be true, we must suppose that dephlogisticated air consists of water united to a little nitrous acid and deprived of its phlogiston; but still the nitrous acid in it must make only a very small part of the whole, as it is found, that the phlogisticated air, which it is converted into, is very small in comparison of the dephlogisticated air.”
pp. 171-172. https://books.google.com/books?id=ygqYnSR3oe0C&pg=PA171
The Scientific Papers of the Honourable Henry Cavendish, F.R.S (1921), Experiments on Air By (1784)
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Henry Cavendish 1
British natural philosopher, scientist, and an important ex… 1731–1810Related quotes

“Just like water and air, connection with others is a basic human need.”
J. R. Partington, Higher Mathematics for Chemical Students (1911)

2010s, 2016, November, New York Times Interview (November 23, 2016)

“Dads—like moms, air, and water—are essential to our lives.”
Source: The Boy Crisis (2018), pp. 105

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

Source: Speech to the Conservatives of Manchester (3 April 1872), quoted in Selected Speeches of the Late Right Honourable the Earl of Beaconsfield, Volume II, ed. T. E. Kebbel (1882), pp. 511-512