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598 that, as we cannot live back into the Tertiary epoch and see what went on at that time, the hypothesis must always remain, in the strictest sense of the word, unverifiable.

The fact is, that if the objections which are raised to the general doctrine of evolution were not theological objections, their utter childishness would be manifest even to the most childlike of believers. But, if the evolution of all living forms, by gradual modification, is an historical fact, why should the attempt to reconstruct the details of that momentous history be regarded as less philosophical or less laudable than the attempt of a Niebuhr, or of a Mommsen, to build up, from ruined monuments, fragmentary inscriptions, and obscure and often contradictory texts, a connected and intelligible history of Rome? Active error may advance knowledge in its efforts to establish itself; and nothing is more remarkable than the number of great things, from the discovery of America to that of the antiquity of man, which have been brought about by the attempt to establish erroneous views. But sitting still, and being afraid to stir, for fear of making mistakes, is certain to end in ruin in science as in practical life.

Prof. Haeckel is not chargeable with the fault of sitting still, and it may be that he moves too quickly now and then. In his book there are some views which I, for one, do not agree with, but as to which it is just as likely I may be wrong as he. I wish he could be persuaded to take a more liberal view of the duration of life on the earth, though he is far less miserly on that point now than when the "Schöpfungsgeschichte," formerly noticed in the Academy, was published. I might desire that he would not mix up phylogenetic "Stammbäume" with objective taxonomy; and I might wish that he would be a little milder with his honest opponents, though I heartily applaud his practice of dealing with critics of the other sort as mere feræ naturæ.

But, when all is said and done in the way of objection, the "Anthropogenic" is a real live book, full of power and genius, and based upon a foundation of practical original work, to which few living men can offer a parallel. If anybody can read it without profiting by the abundant information and fertile suggestions of new lines of thought which it contains, all I can say is, that I envy him; and if anybody can read it without being struck by its clearness and methodical comprehensiveness, and without being convinced that the general line of argument is sound, whatever may be thought of the details, all I can further say is, I do not envy him. I trust that, like the "Schöpfungsgeschichte," the "Anthropogenie" may speedily find an English translator.—Academy.