26. To reply to this argument, so far as it is requisite for us to do so, we must recur to what we have already said; that though we see in many parts of the universe, inorganic as well as organic, marks which we cannot mistake, of design and purpose; yet that this design and purpose are often effected by laws which are of a much wider sweep than the design, so far as we can trace its bearing. These laws, besides answering the purpose, produce many other effects, in which we can see no purpose. We have now to observe further that these laws, thus ranging widely through the universe, and working everywhere, as if the Creator delighted in the generality of the law, independently of its special application, do often produce innumerable results of beauty and symmetry, as if the Creator delighted in beauty and symmetry, independently of the purpose answered. 27. Thus, to exemplify this reflection: the powers of aggregation and cohesion, which hold together the parts of solid bodies, as metals and stones, salts and ice,--which solidify matter, in short,--we can easily see, to be necessary, in order to the formation and preservation of solid terrestrial bodies. They are requisite, in order that man may have the firm earth to stand upon, and firm materials to use. But let us observe, what a wonderful and beautiful variety of phenomena grows out of this law, with no apparent bearing upon that which seems to us its main purpose. The power of aggregation of solid bodies is, in fact, the force of crystallization. It binds together the particles of bodies by molecular forces, which not only hold the particles together, but are exerted in special directions, which form triangles, squares, hexagons, and the like. And hence we have all the variety of crystalline forms which sparkle in gems, ores, earths, pyrites, blendes; and which, when examined by the crystallographers, are found to be an inexhaustible field of the play of symmetrical complexity. The diamond, the emerald, the topaz, have got each its peculiar kind of symmetry. Gold and other metals have, for the basis of their forms, the cube, but run from this into a vastly greater variety of regular solids than ever geometer dreamt of. Some single species of minerals, as calc-spar, present hundreds of forms, all rigorously regular, and have been alone the subject of volumes. Ice crystallizes by the same laws as other solid bodies; and our Arctic voyagers have sometimes relieved the weariness of their sojourn in those regions, by collecting some of the innumerable forms, resembling an endless collection of hexagonal flowers, sporting into different shapes, which are assumed by flakes of snow[7]. In these and many other ways, the power of crystallization produces an inexhaustible supply of examples of symmetrical beauty. And what are we to conceive to be the object and purpose of this? As we have said, that part of the purpose which is intelligible to us is, that we have here a