Note 422 — BOOK II. AN ACCOUNT OF THE WORLD AND THE ELEMENTS. (continued 2)

There is strong evidence for the fact, that, at different times, various substances have fallen from the atmosphere, sometimes apparently of mineral, and, at other times, of animal or vegetable origin. Some of these are now referred to those peculiar bodies termed aërolites, the nature and source of which are still doubtful, although their existence is no longer so. These bodies have, in other instances, been evidently discharged from distant volcanoes, but there are many cases where the substance could not be supposed to have proceeded from a volcano, and where, in the present state of our knowledge, it appears impossible to offer an explanation of their nature, or the source whence they are derived. We may, however, conclude, that notwithstanding the actual occurrence of a few cases of this description, a great proportion of those enumerated by the ancients were either entirely without foundation or much exaggerated. We meet with several variations of what we may presume to have been aërolites in Livy; for example, xxiv. 10, xxx. 38, xli. 9, xliii. 13, and xliv. 18, among many others. As naturally may be expected, we have many narratives of this kind in Jul. Obsequens.