-~ TllOUT BREEDING. 31 



' // It requires careful forethought, that the size of the ponds 

 may be in accordance with the supply and temperature of 

 the water. The cause of failure in most cases has been 

 where persons have attempted to supply large ponds with 

 a diminutive stream; thus exposing a large area to the heat 

 of a summer atmosphere and the rays of the sun. "The 

 sjiape also of the ponds has much to do with the tempera- 

 ture of the water ;)ian oblong is pr eferabl e to a circle ; if ' 

 the width of the pond is one-tenth of its l ength , so much 

 the better, as the water pajses through q uicker , and rglains 

 its c oldnes s to a greater degree. Trees, though they may 

 shade and serve to beauti fy, cause much annoyance-, as the 

 leaves falling or being blown into the water, sink and accu- 

 mulate on the bottoin, or are c arried by the c urren t against 

 and clog the wire screens which are placed i_n the outle ts 

 to k^p the fish in the ponds allotted to them, /A chciip 

 and efficien t method of d iminishin g the s urfac e exposed to 

 the sun is with floats or platforms made of rough board s, 

 moored in the p onds ; these also make an acceptable s hade 

 and hiding-plags %" tbe fish. — tuu. ^■^S'vv p-e^f^i^ — 



(A The race-ways, which, as I have before remarked, are 

 the spawning g round s of the fish, should be fi_ve or six 

 inches d^ep, from two to three and a half feet wide, and 

 from t went y to sixty feet lojig, according to the size of the 

 ponds a_nd the s uppl y of water.') The bQttom_s of the race- 

 ways should be c overed to the depth of three inches or 

 more with fine gravel for the trout to inake their nests in. 

 The sides should be of boards an inch thick and twelve 

 inches wide. If the slope of the ground is such that there 



