On passing through the stables and housings for stock, I noticed a simple, yet ingenious contrivance for watering cattle, which I am not sure I can describe accurately enough, without a drawing, to convey a tangible idea of it to my agricultural neighbors in America. It may be called the buoy-cock. In the first place, the water is brought into a cistern placed at one end of the stable or shed at a sufficient elevation to give it the necessary fall in all the directions in which it is to be conducted. The pipe used for each cow-box or manger connects each with the cistern, and the distributing end of it rests upon, or is suspended over, the trough assigned to each animal. About one-third of this trough, which was here a cast-iron box, about twelve inches deep and wide, protrudes through the boarding of the stable. In this outside compartment is placed a hollow copper ball attached to a lever, which turns the axle or pivot of the cock. Now, this little buoy, of course, rises and falls with the water in the trough. When the trough is full, the buoy rises and raises the lever so as to shut off the water entirely. At every sip the animal takes, the buoy descends and lets on again, to a drop, a quantity equal to that abstracted from the inside compartment. Thus the trough is always kept full of pure water, without losing a drop of it through a waste-pipe or overflow. Where a great herd of cattle and a drove of horses have to be supplied from a deep well, as in the case of Mr. Jonas, at Chrishall Grange, this buoy-cock must save a great amount of labor.