TROUT-HATCHERIES 113 



it is not intended to hold fish much beyond the 

 fry stage, in other words to get rid of them as 

 soon as they have become advanced fry, either 

 by planting, sale, or depositing in outside nurs- 

 ery-ponds, then the smallest house which can 

 be considered will be 50 feet long, by 20 feet 



•wide, using the same type of trough just de- 

 scribed. Tlds will accommodate, with outside 



Hrough attachments or nursery-ponds, between 

 2,000,000 and 3,000,000 fish of advanced-fry 

 stage and the smaller sizes of fingerlings. Yet 

 a house of this size is small for the work named, 

 and entails a great deal of disagreeable outside 

 work in February and March, so that it would 

 be better if larger, so as to avoid having any 

 outside troughs. 



Construction of a Good House. — To my mind 

 the ideal hatching-house for trout, taking into 

 consideration compaMness, no waste room, and 

 a minimum amount of water, is one which is 

 100 feet long and 40 feet wide. Such a house 

 will easily provide accommodations for 3,000,- 

 000 advanced fry and fingerlings to No. 2 size. 

 K it is necessary, and the fish-culturist be skilled 

 and bold, he can carry 5,000,000 of advanced fry 



