Take the case of yttrium. It has its definite atomic weight, it behaved in every respect as a simple body, an element, to which we might indeed add, but from which we could not take away. Yet this yttrium, this supposed homogeneous whole, on being submitted to a certain method of fractionation, is resolved into portions not absolutely identical among themselves, and exhibiting a gradation of properties. Or take the case of didymium. Here was a body betraying all the recognized characters of an element. It had been separated with much difficulty from other bodies which approximated closely to it in their properties, and during this crucial process it had undergone very severe treatment and very close scrutiny. But then came another chemist, who, treating this assumed homogeneous body by a peculiar process of fractionation, resolved it into the two bodies praseodymium and neodymium, between which certain distinctions are perceptible. Further, we even now have no certainty that neodymium and praseodymium are simple bodies. On the contrary, they likewise exhibit symptoms of splitting up. Now, if one supposed element on proper treatment is thus found to comprise dissimilar molecules, we are surely warranted in asking whether similar results might not be obtained in other elements, perhaps in all elements, if treated in the right way. We may even ask where the process of sorting‐out is to stop—a process which of course presupposes variations between the individual molecules of each species. And in these successive separations we naturally find bodies approaching more and more closely to each other.(255) Once more this reproach against the Ancients is an unwarrantable statement. Their initiated philosophers at any rate, can hardly come under such an imputation, since it is they who have invented allegories and religious myths from the beginning. Had they been ignorant of the Heterogeneity of their Elements they would have had no personifications of Fire, Air, Water, Earth, and Æther; their cosmic gods and goddesses would never have been blessed with such posterity, with so many sons and daughters, elements born _from_ and _within_ each respective Element. Alchemy and Occult phenomena would have been a delusion and a snare, even in theory, had the Ancients been ignorant of the potentialities and correlative functions and attributes, of every element that enters into the composition of Air, Water, Earth, and even Fire—the latter a _terra incognita_ to this day to Modern Science, which is obliged to call it motion, evolution of light and heat, state of ignition—defining it by its outward aspects in short, in ignorance of its nature.