This great change extinguishes a tribe of agents as numerous and troublesome as any that roams the Upper Missouri or the Lower Colorado. As numerous, did we say? It outnumbered all the septs of the Sioux--did more travelling and peopled more lodges. It had its peculiar literature and its peculiar vehicles. We have known a single contract made with a Western carriage-factory for five hundred sewing-machine wagons, for the use of one out of the fifteen or twenty companies. All these gay and jaunty equipages go into quod, like the tumbrils and ambulances left over in 1865, and with them, into yet more helpless disuse, a mass of literature, written, printed and oral, great beyond computation. It is a fossil industry whereof even the bones have suddenly perished. To its credit, be it said, it died game, struggling to the last, its battlefield the lobbies of Congress and the halls of the Patent Office. Gold and greenbacks were shed like water, but not much blood save the blood of the grape. All was in vain. The little needle, with an eye near the point, the sharp steel weapon of Howe that so long held at bay all assailants, puzzled a succession of judges of first and second instance, original and appellate, and enriched a generation of attorneys, was forced finally to succumb. All the world and his wife--his wife especially--may make and use a needle with any style or position of hole without paying a cent of royalty for the inestimable privilege. That historic implement has the largest liberty, and may disport itself in an infinity of scrolls and intricacies over the raiment of male and female. The befrogged officer is no longer limited in the arabesques of braid and tinsel that make gay his manly breast. He commands all the resources of Snip's imagination, and whirligigs beyond what hath entered the mind of man to conceive will shortly meander over the cerulean expanse. KATERFELTO IN REPOSE. Is there not a lull in the quack-medicine business? Its advertisements do not appear to us to shine with the brilliancy of old. Those astonishing portraits of Old Doctor So-and-So, and the gorgeous perspective view of the interior of Professor Snooks's laboratory, all alive with forty 'prentice-power pill-machines and tincture-vats like the pools of a swimming academy, have ceased to illustrate the condition of modern art and medicine.