and matter again so met, precisely similar effects would of necessity require to occur: but the occurrence of similar effects under similar conditions is all that we mean by a natural law. Continuing, then, our quotation from Mr. Herbert Spencer's terse and lucid exposition of the nebular theory, we find this doctrine virtually embodied in the next sentences:--"Eventually this slow movement of the atoms towards their common centre of gravity will bring about phenomena of another order. "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] It would be tedious and unnecessary to trace this genesis of natural law any further: indeed, it would be quite impossible so to trace it for any considerable distance without feeling that the ever-multiplying mazes of relations renders all speculation as to the actual processes quite useless. This fact, however, as before insisted, in no wise affects the only doctrine which I here enunciate--viz., that the self-generation of natural law is a necessary corollary from the persistence of matter and force. And that this must be so is now, I hope, sufficiently evident. Just as in the first dawn of things, when the proto-binary compounds of matter gave rise to new relations together with their appropriate laws, so throughout the whole process of evolution, as often as matter acquired a hitherto novel state, or in one of its old states entered into hitherto novel relations, so often would non-existent or even impossible laws become at once possible and necessary. And in this way I cannot see that there is any reason to stop until we arrive at all the marvellous complexity of things as they are. For aught that speculative reason can ever from henceforth show to the contrary, the evolution of all the diverse phenomena of inorganic nature, of life, and of mind, appears to be as necessary and as self-determined as is the being of that mysterious Something which is Everything,--the Entity we must all believe in, which without condition and beyond relation holds its existence in itself.