200 A Walk from 



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 distri- 

 buting 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 Chris- 

 hall Grange, this buoy-cock must save a great amount 

 of labor. 



