ness so as to exclude flattering opinion; of a machine for drawing the right conclusion, which will doubtless by and by be improved into an automaton for finding true premises; of a microphone which detects the cadence of the fly's foot on the ceiling, and may be expected presently to discriminate the noises of our various follies as they soliloquize or converse in our brains—my mind seeming too small for these things, I get a little out of it, like an unfortunate savage too suddenly brought face to face with civilization, and I exclaim —
"Am I already in the shadow of the Coming Race? and will the creatures who are to transcend and finally supersede us be steely organisms giving out the eflluvia of the laboratory, and performing with infallible exactness more than everything that we have performed with a slovenly approximativeness and self-defeating inaccuracy?"
"But," says Trost, treating me with cautious mildness on hearing me vent this raving notion, "you forget that these wonder-workers are the slaves of our race, need our tendance and regulation, obey the mandates of our consciousness, and are only deaf and dumb bringers of reports which we decipher and make use of. They are simply extensions of the human organism, so to speak, limbs immeasurably more powerful, ever more subtle finger-tips, ever more mastery over the invisibly great and the invisibly small. Each new machine needs a new appliance of human skill to construct it, new devices to feed it with material, and often keener-edged faculties to note its registrations or performances. How then can machines supersede us?—they depend upon us. When we cease, they cease."
"I am not so sure of that," said I, getting back into my mind, and becoming rather wilful in consequence. "If, as I have heard you contend, machines as they are more and more perfected will require less and less of tendance, how do I know that they may not be ultimately made to carry, or may not in themselves evolve, conditions of self-supply, self-repair, and reproduction, and not only do all the mighty and subtle work possible on this planet better than we could do it, but with the immense advantage of banishing from the earth's atmosphere screaming consciousnesses which, in our compara-
