34 PRACTICAL TROUT CULTURE. 



a small branch from the spring supplies the water 

 by which the machinery in the meat-house (M), 

 used for preparing the fish food, is put in motion ; 

 the waste water then passes to the bass pond (6), 

 in which experiments upon the breeding of the 

 black bass are to be prosecuted during the coming 

 summer. At D is the house of the superintend- 

 ent, while the residence of the proprietor over- 

 looks the whole. The dimensions of the principal 

 ponds are : 



No. 1, 150 by 15 feet 



No. 2, 150 by 18 feet 



No. 3, 185 long, and varying from 20 to 35 feet in width. 

 Depth: No. 1, one to two feet; No. 2, two to four feet; No. 8, 

 three to five feet 



In cases where ponds are constructed in the 

 direct course of a stream, the pond for the* small 

 fry should be placed on one side and connected 

 with the main channel by a race with a sluice- 

 gate at its opening, by which the supply of water 

 may be regulated. Fig. 2 represents a series of 



Fio. 2. 



ponds planned by us in 1869, and now in success- 

 ful operation. The dotted lines indicate the origi 



