VENTILATION. 547 



supplied in various ways, but the simplest and best is sub- 

 stantially as follows : A chimney or opening through the 

 ceiling may be made in the form of a dome or cupola. The 

 top should be roofed over and have lateral openings by 

 means of weather-boards. The most convenient or com- 

 fortable stable the writer has ever seen had such a venti- 

 lator, which was so regulated that it could be partly or 

 wholly closed, as desired. This was accomplished by 

 means of two cords attached to opposite edges of a revolv- 

 ing door, and adjusted in the lower part of this opening or 



FIG. 306. Rack too high. 



chimney. Another special convenience was a contrivance 

 for obtaining and measuring grain to be fed, which was so 

 ingenious that I give a description of it : The grain was 

 conducted from the loft to the feeding floor by a spout in 

 which were two slides. Pulling out one of these slides a 

 few inches permitted the escape of two quarts, and the, 

 other one of four quarts of grain, which was deposited in a 

 drawer beneath. In the bottom of the drawer was a screw, 

 with a handle projecting from the side of the spout. Mov- 

 ing this handle right and left a few times shook the bottom 

 like a sieve, and thus removed all the dust and dirt, leav- 

 ing the grain clean, fresh, and ready for use. 



