The most philosophic account of metallic seed is that, perhaps, of the mysterious adept "EIRENAEUS PHILALETHES," who distinguishes between it and mercury in a rather interesting manner. He writes: "Seed is the means of generic propagation given to all perfect things here below; it is the perfection of each body; and anybody that has no seed must be regarded as imperfect. Hence there can be no doubt that there is such a thing as metallic seed.... All metallic seed is the seed of gold; for gold is the intention of Nature in regard to all metals. If the base metals are not gold, it is only through some accidental hindrance; they are-all potentially gold. But, of course, this seed of gold is most easily obtainable from well-matured gold itself.... Remember that I am now speaking of metallic seed, and not of Mercury.... The seed of metals is hidden out of sight still more completely than that of animals; nevertheless, it is within the compass of our Art to extract it. The seed of animals and vegetables is something separate, and may be cut out, or otherwise separately exhibited; but metallic seed is diffused throughout the metal, and contained in all its smallest parts; neither can it be discerned from its body: its extraction is therefore a task which may well tax the ingenuity of the most experienced philosopher; the virtues of the whole metal have to be intensified, so as to convert it into the sperm of our seed, which, by circulation, receives the virtues of superiors and inferiors, then next becomes wholly form, or heavenly virtue, which can communicate this to others related to it by homogeneity of matter. ... The place in which the seed resides is--approximately speaking--water; for, to speak properly and exactly, the seed is the smallest part of the metal, and is invisible; but as this invisible presence is diffused throughout the water of its kind, and exerts its virtue therein, nothing being visible to the eye but water, we are left to conclude from rational induction that this inward agent (which is, properly speaking, the seed) is really there. Hence we call the whole of the water seed, just as we call the whole of the grain seed, though the germ of life is only a smallest particle of the grain."(1b) (1) _The Answer of_ BERNARDUS TREVISANUS, _etc_. _Op. cit_. p. 218. (2) _op. cit_., p. 22. (3) _Ibid_., p. 16. (1b) EIRENAEUS PHILALETHES: _The Metamorphosis of Metals_. (See _The Hermetic Museum_, vol. ii. pp. 238-240.) To say that "PHILALETHES'" seed resembles the modern electron is, perhaps, to draw a rather fanciful analogy, since the electron is a very precise idea, the result of the mathematical interpretation of the results of exact experimentation. But though it would be absurd to speak of this concept of the one seed of all metals as an anticipation of the electron, to apply the expression "metallic seed" to the electron, now that the concept of it has been reached, does not seem so absurd.