SHORT FEEDING- SPOON. 63 



pass the perforated zinc. The hole is tightened up with a couple 

 of brass screws. (See Fig. 21.) 



k 9J- 



FIG. 20 scale \. 



Nos. 8 and 9 zinc are the proper sizes. If the holes are 

 smaller it is impossible to pass the prepared food through, and if 

 larger, the filaments are too thick to be easily 

 eaten by the fry, and get broken up. Should 

 it be imperative to feed with liver, sheep's 

 is better than bullock's, as it breaks up 

 through the zinc into much larger particles, 

 and, though more costly to buy, there being 

 much less waste, is less expensive. Great 

 care must be taken not to over-feed the fry on 

 the prepared food, or they will stretch their 

 stomachs to the size of the original yolk-sac, 

 a condition which is generally followed by a 

 suffusion of blood near the anus, and death. 



After a fortnight's feeding on the prepared 

 food, finely ground horse-flesh is substituted. FlG ' 21 - scale * 

 This is prepared by selecting the mash from the large chopping- 

 machine with which the food of the older trout is prepared, pound- 

 ing it in the mortar, and passing it through a very fine wire sieve. 

 It is then fed out through No. 9 perforated zinc rolled round a 

 circular base. This utensil we call the 



SHORT FEEDING-SPOON. 



It is found very useful, and obviates any danger of choking, as 

 all particles too large for the fry to swallow are retained in the 

 cylinder, and emptied out into a pail provided for the purpose, to 

 be mixed with the food of the yearling trout (Fig. .22). 



Many ingenious fry-feeding machines have been designed, but 

 as this part of fish-culture demands constant attendance, and can 

 only be successfully undertaken where the whole time of at least 



