these cosmic activities that is the subject of discussion.

§ 8. It may be further urged that there is an obvious difference which destroys the force of the analogy, and calls for a very different interpretation. Matter and force are indestructible, are consequently eternal, and therefore there is no place for the prior action of mind in them and through them. This objection needs thorough consideration. The indestructibility of matter and the correlation of energies do not carry with them the eternity of the physical world. If they did, the present argument would wholly fail.

Plainly the permanence of the present system, once entered on, is an essential part of the laws which control it, and of the constructive purposes it subserves. If matter or energy were suddenly to disappear, or suddenly appear under man's handling, confusion and danger would prevail at once. No more pervasive form of disorder could be introduced. The mere fixedness of laws, therefore, which owe their present value to their certainty, proves nothing as to the eternity of the entire system to which they belong.

"Matter is indestructible, and is measured by weight; energy is indestructible, and is measured by work; intelligence is indestructible, and is measured by adaptations. These great truths explain and supplement each other."* These statements plainly cannot remain in the form in which Prof. Cooke has left them. If these three eternities are co-equal, the first two, matter and energy, exclude the third, intelligence,

* The New Chemistry, p. 208.