Of what Steam has yet accomplished in direct aid of Agriculture, I have little to say, though in Great Britain quite a number of steam-plows are actually at work in the fields, and (I am assured), with fair success. Until something breaks or gives out, one of these plows does its appointed work better and cheaper than such work is or can be done by animal power; but all the steam-plows whereof I have any knowledge seem too bulky, too complicated, too costly, ever to win their way into general use. I value them only as hints and incitements toward something better suited to the purpose. What our farmers need is not a steam-plow as a specialty, but a locomotive that can travel with facility, not only on common wagon-roads, but across even freshly-plowed fields, without embarrassment, and prove as docile to its manager's touch as an average span of horses. Such a locomotive should not cost more then $500, nor weigh more than a tun when laden with fuel and water for a half-hour's steady work. It should be so contrived that it may be hitched in a minute to a plow, a harrow, a wagon, or cart, a saw or grist-mill, a mower or reaper, a thresher or stalk-cutter, a stump or rock-puller, and made useful in pumping and draining operations, digging a cellar or laying up a wall, as also in ditching or trenching. We may have to wait some years yet for a servant so dexterous and docile, yet I feel confident that our children will enjoy and appreciate his handiwork. The farmer often needs far more power at one season than at another, and is compelled to retain and subsist working animals at high cost through months in which he has no use for them, because he must have them when those months have transpired. If he could replace those animals by a machine which, when its season of usefulness was over, could be cleaned, oiled, and put away under a tight roof until next seeding-time, the saving alike of cost and trouble would be very considerable.