PRACTICAL CARP CULTURE. 



27 



of B in the shape of a hinge, now close C to within % of an inch, so it 

 will pass over the end of A. I) is a key in the shape of a wedge to tighten 

 the clamp. Bolt A on the outside of the box so that it will project 1% 

 inches in front of outlet, drive a staple over it in the center. Bolt B 

 directly opposite to A on the outside of box and staple same as A, place 

 the clamp C over the end of A and drive in the key. Fasten the key to 

 the box with a chain. This clamp will not rust so but what it can be 

 easily adjusted above or in the water. Use three clamps on a ten foot box. 



THE MONK WITH CLAMPS. 



It is necessary only to use slats on the inside of the box as the clamps 

 keep the sections firmly to their places from the outside and the sections 

 can be put in or taken out anywhere up or down the box. 



A BOTTOM OVERFLOW AND DRAIN. 



In ponds where the water is cold and the supply constant, and a con- 

 sequent continual overflow, it is very desirable that the water passing out 

 of the pond should be the coldest water it contains. This is always found 

 at the bottom of the. deepest part of the pond. A very practical and pop- 

 ular method of accomplishing this is presented in the accompanying il- 

 lustration. It was introduced into this country by George Eckardt, for- 

 merly Superintendent of the Missouri Fish Commission. We take the 

 description given of it by I. G. W. Steedman, A. M., M. D., ex-Chairman 

 of the Commission of that State, in his work on "Carp and Carp Culture 

 in Missouri." 



"The illustration represents a combined overflow and draining appara- 

 tus, the sketch having been drawn from those now in use in three of our 

 Forest Park spawning ponds. 



A B is a wooden box running crosswise to (at right angles with) the 

 dam, the box G H, where the water enters, being placed in the lowest 



