9 quotes
Hammer a piece of cold iron for a considerable time; you will unite its parts and diminish its bulk, and then it will appear heavier when put into the balance.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
Having thus vanished levity, and its upward motion, from all the boundaries of nature, we aver anew, that the elements of air and fire, which alone come into the dispute, are endowed with gravity.
Art IX. A Translation of Rey's Essays on the Calcination of Metals, &c (1821)
What is there like this in lead?
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
This he confirms by the example of animals, which become heavier after death, from the extinction of the celestial heat, the soul, (as he thinks), both of animals and all other mixed and compound bodies.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
Thus the opinion of Cardan appears so frivolous, that I am grieved that a great man, and one who is justly esteemed by all the world, should have lately declared to me that he inclines towards it.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
But if we investigate the subject by the balance, a case occurs in which, without any addition or subtraction of matter, a substance will appear more or less heavy; namely, by its contraction or expansion.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
What shadows would be if there were no bodies, such natural motion in the upper regions will become, without levity. For, of a truth, it would be monstrous, to see natural effects without a natural cause. That is said to move naturally whose cause of motion is in itself.
Art IX. A Translation of Rey's Essays on the Calcination of Metals, &c (1821)
On this account I have been obliged to shew, that air is possessed of weight; that it is proved by other investigation than that of the balance; and that even by that instrument, a portion previously altered and thickened, may make its weight manifest.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)
With regard to the celestial heat making bodies light, Scaliger very properly objects that the heavens, which abound in this heat, as being the source of it, must be light (feut leger) and consequently univocal (univoque) with the other bodies, which is absurd.
Art. XI. A Translation of Rey's Essays on the Calcination of Metals, &c (1822)