Now casting a look on all that moves, I see nothing that ascends by its own proper motion. Water, indeed, rises in a glass, if we throw earth into it; but all will allow, that it is not from any levity that is in the water, but rather, that the earth, by falling to the bottom, makes the water ascend. Now, if water does not acknowledge levity as the cause of this motion upwards, why should air confess it, which ascends in like manner when pressed on by water? Why fire, which does the same? It will be said, I doubt not, that if the upward motion of the elements be not natural to them, it must be violent; whence this absurdity follows, that each obtains its place in the universe by force. To this I answer, that the elements not having the cause of these motions in themselves, they may, so far, be called violent; but that this violence is gentle, and nowise ruinous.
- John Rey
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.
- John Rey
wo ingots one... of gold, and the other of iron, which appear by the balance to be equal, are nevertheless not so—for the iron is as much heavier than the gold, according to reason, as the air which it displaces is heavier than that displaced by the gold...
- John Rey
Cardan is the first, who in his fifth book, De Subtilitate, says, that, by conversion into ceruse, or by, gains one-thirteenth part in weight, and gives this reason for it—The lead dies, for the celestial heart, which was its soul, vanishes; whose presence gives it life, and renders it light; as its absence occasions its death, and makes it heavy.
- John Rey
I have now made the preparation; laid as it were the foundations of my answer to the Sieur Burn's demand; namely, that having put two pounds six ounces of fine English tin into an iron vessel, and heated it strongly on an open fire for six hours, stirring it continually, without having added anything, he obtained two pounds thirteen ounces of a white; which at first occasioned him great surprise, and the desire to ascertain whence these seven ounces of increase were derived.
- John Rey
I have now made the preparation; laid as it were the foundations of my answer to the Sieur Burn's demand; namely, that having put two pounds six ounces of fine English tin into an iron vessel, and heated it strongly on an open fire for six hours, stirring it continually, without having added anything, he obtained two pounds thirteen ounces of a white; which at first occasioned him great surprise, and the desire to ascertain whence these seven ounces of increase were derived.
- John Rey