O.M. It could drive lathes, drills, planers, punches, polishers, in a
word all the cunning machines of a great factory?

Y.M. It could.

O.M. What could the stone engine do?

Y.M. Drive a sewing-machine, possibly--nothing more, perhaps.

O.M. Men would admire the other engine and rapturously praise it?

Y.M. Yes.

O.M. But not the stone one?

Y.M. No.

O.M. The merits of the metal machine would be far above those of the
stone one?

Y.M. Of course.

O.M. Personal merits?

Y.M. PERSONAL merits? How do you mean?

O.M. It would be personally entitled to the credit of its own
performance?

Y.M. The engine? Certainly not.