Aiiicrican Fusheries Society. 73 



sistt'd in notliiiii: iuoit nor loss than the oxcrenicnt dropped by 

 the fishes in the ])onds ), these tanks go on with tlieir work auto- 

 matically and indefinitely. The water, from two to throe fe<'t in 

 depth, being loft undisturlK'd two or three weeks, is found ))eo- 

 pled with swarming myriads of minute organisms of the species 

 above named. Twenty thousand trout a year old, or three thou- 

 sand two years old, which last would average about one-half 

 pound in weight, are considered sufficient for a pasture of that 

 size (160 square yards, or 1-30 acre), and the avidity with whieli 

 they rush to occupy and ravage their new feeding ground is a 

 delight to the pisciculturist. If the propagation has been ordi- 

 narily abundant, these 20,000 young fry or 3,000 yearlings will 

 subsist royally in a tank of the size indicated for an entire month. 

 They will eat on an average twenty to tw<'nty-tive ])ounds of food 

 per day, or 600 to 800 ])ounds per month. When. at the close of 

 the month the tank has become depleted, tlic gate is (i|K'ned and 

 the fish driven like a flock of sheep to a new and simihir ])astur". 

 The first tank, being closed and left in quiet, immediately begin- 

 the process of reproduction, and at the end of two or tliree week- 

 is swarming again ^\'ith the varied minute organic life which far 

 surpasses in value, as food t'oi- lish. anytliing that has been de- 

 vised by man." 



The accounts of .Mr. i^ngrin's work attracted many visitors; 

 and among them two eminent men in their departments, Prof. 

 Francis Day of England and Mr. Kaveret-Wattel of France, are 

 on record as having, from personal inspection, reached the most 

 fiattei-ing conclnsions as to the success of the method and th'^ 

 great l)enefits that fishculture would reap from it. But I regret 

 to have to say that tlieir expectations have not been realized. The 

 method of T.uoTin. thongh ])uslied l.y the inventor upon the at- 

 tention of fish-culturists in various eountries, has not come into 

 use. and appears to have been found wanting. In li^Ol, in a 

 book on trout-breeding, we find this same Mr. IJaven't-Wattel 

 Avriting thus about the feeding of the fry : "The food of trout 

 fry in captivity demands minute care and even that will not al- 

 ways avail to prevent heavy losses. One of the princijial dinicul- 

 ties is that no artificial food can re])lace the living j^rey forming 

 the food of frv that are liatched and live at liberty. When one 

 is raising- a small iiuinlier of fry it is sometimes imssible to |.ro- 



