[W]e must not only inquire whence these seven ounces are derived, but, moreover, whence that which has replaced the loss of weight, necessarily arisi… - Jean Rey

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.

Thus, the motion of the orbits of the planets from east to west, having its cause in a higher heaven, is called by all violent, without, however, its doing them any injury. Moreover, they who argue thus condemn themselves, since they are compelled to admit, that not only the motion of water and air, but their very abiding places, are held by violence:—that of the latter, under fire, and that of the former, above earth.

I answer, and proudly maintain, "That this increase of weight comes from the air, thickened and made heavy, and in some measure rendered adhesive in the vessel by the violent and long—continued heat of the furnace—which air mixes with the calx (its union being assisted by the continual stirring), and attaches itself to its smallest particles—no otherwise than as water, when sand is thrown into it, makes it heavier by moistening it, and adhering to its smallest grains."