“The theory of ejection was adopted as the only theory by which the chemical, physical, and microscopic structure of meteorites of all orders—from bolosiderites to asiderites—can be accounted for. They were certainly once exposed to such conditions as exist only in the interior of large orbs—suns or planets. And as certainly they have somehow come forth from such interiors. The expulsive force shown by observation to reside in the only sun-like body we can examine, indicates the only way in which such expulsion can conceivably have been effected. Hence, I infer (for my own part I feel assured of the weight of evidence) that all orders of meteorites were expelled from some orbs at some time when such orbs were in the sun-like stage. Generalizing, I include in this theory all orders of meteors, and find all their most characteristic peculiarities explained, and all orders of meteor systems or comets, finding their several orders thus and thus only explicable (if we include all suns now and in the past, all planets in all solar systems, in their past sun-like state, among the sources of meteors and comets). No other general theory seems to me possible.” Again, in an article in _Knowledge_ for April, 1887, page 135, my father makes the following statement regarding his theory concerning comets and meteors: “All comets and meteors are sun-born. But it is not to our own sun, nor to those other suns, the stars, that I attribute all comets and meteor systems. Many millions have come doubtless from our sun during the many millions of years he has been a sun, though few of his cometic children are known to terrestrial astronomers. Millions of millions have come from the many millions of suns in our galaxy during the many millions of years of their sun-like existence. But the giant planets were once suns,[11] and in their sun-like state, which must have lasted millions of years, they must have ejected their smaller comets and meteor systems which even now, after millions of years, have paths passing near the orbits of their parent orbs. Our earth and her fellow terrestrial planets had their sun-like stage of life, too, and it must have been while the earth was a sun that the meteors explained specially by Tschermak’s theory were expelled.”