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Ewald Hering of Prague, delivered so long ago as 1870, "On Memory as a Universal Function of Organized Matter."

The true theory of unconscious action, then, is that of Professor Hering, from whose lecture it is no strained conclusion to gather that he holds the action of all living beings, from the moment of their conception to that of their fullest development, to be founded in volition and design, though these have been so long lost sight of that the work is now carried on, as it were, departmentally and in due course according to an official routine which can hardly now be departed from.

Of course the theory is not new it was in the air and bound to come; but when it came, it came through Professor Hering of Prague, and not through those who, great as are the services they have rendered, still did not render this particular one of making memory the keystone of their system. Mr. Romanes now says: "Why, of course, that's what they were meaning all the time."

The impression left upon me is that he is all at sea for want of the clue with which Professor Hering would have furnished him, and that had that clue been presented to him a dozen years or so earlier than it was he would have adopted it. As regards Mr. Romanes the case is different. Thus Mr.

Spencer at times closely approached Professor Hering and "Life and Habit," he had nevertheless nowhere shown that he considered memory and heredity to be parts of the same story and parcel of one another.

Nevertheless, it must be admitted that the difficulties of the theory towards which I suppose Professor Hering to incline are like those of all other theories on the same subject almost inconceivably great. In "Life and Habit" I did not touch upon these vibrations, knowing nothing about them.

In execution of the power conferred upon me by the act making appropriations for the expenses of the District of Columbia for the year ending June 30, 1890, I did on the 17th day of August last appoint Rudolph Hering, of New York, Samuel M. Gray, of Rhode Island, and Frederick P. Stearns, of Massachusetts, three eminent sanitary engineers, to examine and report upon the system of sewerage existing in the District of Columbia.

Concerning the identity of the main idea put forward in "Life and Habit" with that of Professor Hering's lecture, there can hardly, I think, be two opinions. Not only is the main idea the same, but I was surprised to find how often Professor Hering and I had taken the same illustrations with which to point our meaning.

On this the eternal agitation becomes so much enhanced, that equilibrium is visibly disturbed, and the action ensues which is proper to the vibration of the particular substance under the particular conditions. This, at least, is what I suppose Professor Hering to intend.

I hope that it will thus be seen that neither Professor Hering nor I have fallen into the fallacy of Von Hartmann, but that rather Von Hartmann has fallen into his fallacy through failure to grasp the principle which Professor Hering has insisted upon, and to connect heredity with memory. Professor Hering's philosophy of the unconscious is of extreme simplicity.