different yet strictly definite proportions, there being no intermediate combinations, no transitional compounds. If each element did not admit of union with many others, the world would be dead and poor, its contents few and unvaried; if their unions were not always regulated by law, disorder would everywhere prevail. How comes it that they are so made in relation to one another that their manifold unions are ever regulated by law, and generate an endless variety of admirable products? Who made them thus ? Did they make themselves? or, did any blind force make them? Reason answers that they must have been made by an intelligence which wanted them for its purposes. When the proportions of the elementary constituents are altered, the same elements produce the most diverse substances with the most dissimilar and even opposite properties, charcoal and diamond, a deadly poison or the breath of life, theine or strychnine. These powers all work together for good; but if they worked even a very little differently-if the circumstances in which they work, not to speak of the laws by which they work, were altered-they would spread destruction and death through the universe. The atmosphere is rather a mixture than a combination of chemical elements, but it is a mixture in which the constituents are proportioned to each other in the only way which fits it to sustain the lives of

plants and animals, and to accomplish its many other important services; and wonderful in the extreme is the provision made for the constant restoration of the due proportions amidst perpetual oscillations. One of the chiefs of modern chemistry, Baron Liebig, points to what takes place when rain falls on the soil of a field adapted for vegetable growth as to something which "effectually strikes all human wisdom dumb.” "During the filtration of rain - water," he says, "through the soil, the earth does not surrender one particle of all the nutritive matter which it contains available for vegetable growth (such as potash, silicic acid, ammonia, &c.); the most unintermittent rain is unable to abstract from it (except by the mechanical action of floods) any of the chief requisites for its fertility. The particles of mould not only firmly retain all matter nutritive to vegetable growth, but also immediately absorb such as are contained in the rain-water (ammonia, potash, &c.) But only such substances are completely absorbed from the water as are indispensable requisites for vegetable growth; others remain either entirely or for the most part in a state of solution." The laws and uses of light and heat, electricity and magnetism, and the adjustments which they presuppose, all point not less clearly to the ordinances of a supremely profound and accurate mind. In a word, out of a few ele

ments endowed with definite powers, this world with its air and its seas, its hills and valleys, its vegetable forms and animal frames, and other worlds innumerable, have been built up by longsustained and endlessly-varied processes of chemical synthesis mostly conducted under conditions so delicately adjusted to the requirements of each case, that the ablest chemists, with all their instruments and artifices, cannot even reproduce them on any scale however small. Can these elements be reasonably thought of as having been unfashioned and unprepared, or these processes as having been uninstituted and unpresided over by intelligence?1

The sciences of geology and paleontology disclose to us the history of our earth and of its vegetable and animal organisms. They prove that for countless ages, that from the inconceivably remote period of the deposition of the Laurentian rocks, light and heat, air and moisture, land and sea, and all general physical forces, have been so arranged and co-ordinated as to produce and maintain a state of things which secured during all these countless ages life and health and pleasure for the countless millions of individuals contained in the multitude of species of creatures which have contemporaneously or successively peopled the earth. The sea, with its winds and waves, its streams and currents, its salts, its flora and fauna, 1 See Appendix XV.

teems with adaptations no less than the land. Probably no one has studied it with more care or to more purpose than Lieutenant Maury; and his well-known work on its physical geography proceeds throughout on the principle that "he who would understand its phenomena must cease to regard it as a waste of waters, and view it as the expression of One Thought, a unity with harmonies which One Intelligence, and One Intelligence alone, could utter;" while many of its pages might appropriately be read as a commentary on these lines of Wordsworth,

"Huge ocean shows, within his yellow strand,

A habitation marvellously planned,

For life to occupy in love and rest."

The sciences referred to certify further, that as regards the various forms of life there has been from the time when it can be first traced to the present day "advance and progress in the main," and that the history of the earth corresponds throughout with the history of life on the earth, while each age prepares for the coming of another better than itself. But advance and progress presuppose intelligence, because they cannot be rationally conceived of apart from an ideal goal foreseen and selected. Volumes might be written to show how subtly and accurately external nature is adjusted to the requirements of vegetable and animal life, and how vegetable and animal life are

man.

inter-related; nay, even on how well the earth is fitted for the development and happiness of Think of the innumerable points of contact and connection, for example, between physical geography and political economy, which all indicate so many harmonies between the earth and man's economical condition, capacities, and history.1

The vegetable and animal kingdoms viewed generally, are also striking instances of unity of plan, of progressive order, of elaborately adjusted system. There are general principles of structure and general laws of development common to all organisms, constituting a plan of organisation capable of almost infinite variation, which underlies all the genera and orders of living creatures, vegetable and animal. It comprehends a number of subordinate plans which involve very abstract conceptions, and which even the ablest naturalists. still very imperfectly comprehend. These higher plans would probably never have been thought of but for the detection of the numerous phenomena which seemed on a superficial view irreconcilable with the idea of purpose in creation. Just as it was those so-called "disturbances" in the planetary orbits, which appeared at first to point to some disorder and error in the construction of the sidereal system, that prompted Lagrange to the investiga1 See Appendix XVI.

K