232 Flow to obtain it. 
times. Several machines have been invented for feeding fry, some 
of which are ingenious. The principle is a rotary wheel, which is 
charged with food, and is so arranged as to be constantly letting 
out a small quantity in the course of its revolutions. These 
machines have not, however, come into general use. Fish do 
not feed so regularly as the machines would have them do. 
Sometimes they eat more and sometimes less, according to 
surrounding circumstances, such as temperature, light, atmospheric 
conditions, etc., and a fish culturist is aware of these changes, and 
can act accordingly. I have known a machine go on discharging 
food into a rearing box when the fish were off the feed, until the 
water became sickly, and it does not take long to bring about 
such a result. 
There is a great advantage, too, in having the boxes and fish 
under constant supervision, which is the case if hand-fed. A 
caretaker can see any little change or notice any irregularity that 
may occur anywhere, and it can have his attention at once. It 
often happens that such attention is necessary, and will prevent 
great injury being done, or perhaps great loss of life. The fish 
should be carefully watched and their every movement noticed 
from day to day, comparing one day with another, and in this way 
much will soon be learned that cannot be acquired from any 
books. The food should be varied a good deal, and I use a large 
quantity of eggs for feeding the young fry. They may be used 
either raw or boiled, and, if raw, the yolk and white may be mixed 
together and water added, and the liquid decanted as described 
in the case of liver. Curd made of rennet and milk is also ex- 
cellent in limited quantity, but both this and egg should be 
cautiously used. Too much of either may prove hurtful. 
The best artificial food that I have ever met with, however, 
is shrimp paste, and this I have used, as well as mussel paste, for 
feeding and rearing fry, and have found it most successful. To 
make it the shrimps have to be boiled and shelled, and the same 
applies to the mussels when they are used. A No. 22 “Excelsior” 
chopper, which may be obtained through any ironmonger, will be 
found excellent for preparing this or other food for fish of any 
description, small or large. IJ have had an extra fine plate made 
for preparing this paste, which may be procured with the machine 
