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 to respond in a fixed manner and a certain way to all the usual external stimuli it encounters in the course of a usual life. Thus, under usual circumstances, it does the usual thing. Under unusual circumstances it still does the usual thing, wherefore the highhole perforating the ice-house is guilty of lunacy — of unreason, in short. To do the unusual thing under unusual circumstances, successfully to adjust to a strange environment for which his heredity has not automatically fitted an adjustment, Mr. Burroughs says is impossible. He says it is impossible because it would be a non-instinctive act, and, as is well known, animals act only through instinct. And right here we catch a glimpse of Mr. Burroughs's cart standing before his horse. He has a thesis, and though the heavens fall he will fit the facts to the thesis. Agassiz, in his opposition to evolution, had a similar thesis, though neither did he fit the facts to it nor did the heavens fall. Facts are very disagreeable at times.

But let us see. Let us test Mr. Burroughs's test of reason and instinct. When I was a small boy I had a dog named Rollo. According to Mr. Burroughs, Rollo was an automaton, responding to external