Here shall you trace in flowing operation, In every state of practical, busy movement, the rills of civilization, Materials here under your eye shall change their shape as if by magic, The cotton shall be pick’d almost in the very field, Shall be dried, clean’d, ginn’d, baled, spun into thread and cloth before you, You shall see hands at work at all the old processes and all the new ones, You shall see the various grains and how flour is made and then bread baked by the bakers, You shall see the crude ores of California and Nevada passing on and on till they become bullion, You shall watch how the printer sets type, and learn what a composing-stick is, You shall mark in amazement the Hoe press whirling its cylinders, shedding the printed leaves steady and fast, The photograph, model, watch, pin, nail, shall be created before you.