188 



AN EGG FARM. 



long yard begins at Y. If the "lay of the ground'' 

 admits of a shallow ditch, the approach, 0, may be 

 omitted. 



The tank may be two, three or four feet wide, or more, 

 according to the quantity of running water that can be 

 supplied. As the idea is to have the tank several hun- 

 dred feet long and divided by wirework into sections for 

 the accommodation of numerous flocks, a brisk current 

 is demanded for cleanliness's sake, therefore the tank 



FI. 86. EXERCISER FOR WATER FOWL. 



should not be too wide. The depth of the water is very 

 important. The ditch and the tank which lines it 

 should be constructed so that the depth may be just suf- 

 ficient to cause the ducks to assume the position shown 

 in the cut, and grope and grovel for the feed which has 

 been dropped from the cylinders above upon the bottom 

 of the tank, thus giving play to all the principal sets of 

 muscles. As they hurry through the yards, they will at 

 times use their wings as well as their legs, and, while 



