or supposition, provisionally employed as an explanation of phenomena," must be verified before it can be accepted as truth. Moreover, it can stand even as a hypothesis only if it meets the test of observation and experiment. It it can demonstrate its adaption to explain all the facts, it may, until another and better theory is propounded, be accepted as a theory. When it does not explain the facts, it must be modified or abandoned.

Since the evolutionary hypothesis is employed as an explanation of certain origins, a legitimate test of the theory is its adaptation to explain these origins. This test we now shall apply. We shall try to answer the question: Is the evolutionary theory entitled to the name of a working hypothesis? Is it able to account for those things which it is set forth by its spokesmen to account for? Does it account for the origin of the universe, of life, and of the various forms of life?

Scientists as a rule disclaim any intention to account, on the basis of their hypothesis, for the origin of matter. When it is suggested to them that any theory of origins should also account for the FIRST ORIGIN, the beginning of things, they direct us to philosophy: "Evolution is not concerned with the origin of matter; it takes matter for granted; the origin of matter is properly a philosophical and not a scientific problem."

Let us note the fallacies of this position. In the first place it is not proper to introduce the word "science" into this plea. Science is, indeed, only concerned with things that can be demonstrated by observation and from experience; and since no one has seen the beginning of matter, science is very properly not concerned with it. But evolution is not a science. It is a hypothesis, a theory. It is an explanation proposed for certain phenomena. 'And we have a right to demand that, if it wants recognition even as a theory, it must explain those phenomena. Now the principle of evolution is: All things have developed through certain forces which inhere in matter. In other words, without being acted upon from the outside, (without a creative word of God, for instance,) the unvierse [tr. note: sic] has come to be what it is to-day. In matter there are from the beginning certain forces inseparable from matter. These acted in such a way that very simple plants and animals became very complex; and this without any directing Intelligence. This is the evolutionary theory. Now, we hold that a theory which claims to account for the beginning of all animal life (and every species of animal life), for the beginning of plant life (and of every species of plant life), for the beginning of life germs, of the globe, of the sun and stars, cannot stop short when we press our questions still farther and ask: Whence is matter? Whence is force?

Nor, indeed, do evolutionists hesitate to express an opinion concerning the origin of matter and force. The universe, as it exists to-day, is made up of matter disposed in various forms,—stars, rock, plants, animals,—and endowed with energy in various forms; and from the earliest age of speculation, as we have seen, the human mind conceived of a time in which there was unorganized matter, substance without form. Like the ancient Greek philosophers, evolutionists to-day try to formulate a working hypothesis to account for the origin of the universe. It is believed that, in a broad way, the Nebular Hypothesis put forth by La Place indicated the manner in which the earth and the system to which it belongs have been evolved. We have outlined, briefly, in our first chapter, the main features of this theory. We shall now indicate the difficulties which stand in the way of its acceptance even as a working hypothesis.

1. The Nebular Hypothesis assumes that during a past endless time there has existed an incalculable number of original atoms. Let us understand that according to the so-called atomic theory, matter is composed of indivisible particles, called atoms. Since the discovery of radium this theory has been considerably modified, each atom now being understood to consist of many thousands of smaller particles, called electrons. However, whether we call them atoms or electrons, the smallest, indivisible particles of matter are assumed to have existed during infinite past time. Now, the origin of these simplest component parts of matter remains an unsolved mystery. The mind is unable even to formulate a guess with reference to their organization.

2. A second postulate of the Nebular Hypothesis is the origin of force and motion in the huge gas ball which existed in the beginning. La Place says that "at some point concentration took place in the homogeneous mass, this contraction produced radiation of heat and light, and through the differences in temperature, motion and dynamic reaction were produced." The difficulty which inheres in this postulate is the unquestioned fact that all motion in nature follows certain immutable laws*, [*These laws, so far as known, form the basis of what we call physics and chemistry.] and the origin of these laws is not accounted for by the theory. Laws never make themselves, and their complexity,—immeasurably beyond our power of exploration—yet everywhere adjusted to a definite end, is so intricate that their origin can by no means be accounted for by chance.

3. According to the theory matter was first in "nebular" (gas) form, and that the gases existing diffused through space were, through the motion which originated, changed from a huge ball of fire-mist to a semi-solid sphere, which threw off smaller spheres (the planets) that gradually became solid. Now, this is contrary to our knowledge of gases. Gases may be produced from solids, but an incandescent gas will not, through simple motion, become a solid substance. Gases may be solidified, but only in two ways, by pressure or when greatly cooled,—when they become ice. But they do not retain this form when the pressure or the cooling agency is removed. Gases, as we know them, all have a tendency to expand indefinitely. They have no tendency to solidify, as the hypothesis presumes.

4. La Place assumed that the solar system when still in gaseous state, began to revolve upon its axis, and that, as the gas ball continued to revolve, it condensed. As condensation went on, the rotation became faster, and a ring of matter was thrown off from the hardening core. This ring again resolved itself into a rotating globe which, still in a fluid state, threw off other balls, which revolved around their mother, the first planet, even as the latter continued to follow an orbit around the central body, the sun. In this way the planets of the solar system, including the earth, (according to the theory), were evolved together with their satellites or moons. The difficulty attending this view of planetary evolution is found in the difference between the movements of a number of satellites around the planets. While the satellites of the earth, of Jupiter and of Saturn revolve from west to east, the moons of Uranus and Neptune have an orbital movement from east to west. This is regarded also by the friends of the Nebular Hypothesis as one of the gravest difficulties, since no mechanical law will explain the reverse movement of the satellites of the remotest planets when they, as well as Jupiter, Saturn, and the rest are supposed to have been cast off by the same central body.

5. According to the theory, the original atoms during the process of world-making united into molecules. The laws according to which atoms unite,—so that, for instance, the hydrogen atom each unites with two atoms of oxygen, and so down the list of all known existences,—these laws are among the assured results of scientific study. Now, the entire science of chemistry in all its branches is built upon the axiom that molecules are absolutely unalterable and that