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 comparatively clumsy race, make an intolerable noise and fuss to each other about every petty ant-like performance, looking on at all
