Note 22 — Chapter IV

"Arguing from the known laws of atomic combination, it will happen that, when the nebulous mass has reached a particular stage of condensation—when its internally situated atoms have approached to within certain distances, have generated a certain amount of heat, and are subject to a certain mutual pressure (the heat and pressure increasing as the aggregation progresses), some of them will suddenly enter into chemical union. Whether the binary atoms so produced be of kinds such as we know, which is possible, or whether they be of kinds simpler than any we know, which is more probable, matters not to the argument. It suffices that molecular combinations of some species will finally take place." We have, then, here a new and important change of relations. Matter, primordially uniform, has itself become heterogeneous; and in as many places as it has thus changed its state, it must, in virtue of the fact, give rise to other hitherto novel relations, and so, in many cases, to new laws.[22]