I70 DOMESTICATED TROUT. 



a more natural and wholesome way than to gorge 



means of the motion of the little water-wheel opens from time 

 to time and some of the food is given out with the water. The 

 opening of the valve is regulated by letting more or less water 

 flow into the water-wheel with the faucet found on the conduit. 



To guard against the adhesion of the little pieces of food to 

 the under part of the box and the valve, the discharging opening 

 should often be cleaned with water passed through the tube. 



To work the whole feeding machine a pipe from two to three 

 centimetres in diameter is required. The machine ought to be 

 kept very clean, and should be lubricated from time to time, as 

 all mechanical contrivances should be, in order that it may run 

 more easily. 



The machine should, if possible, and if there is enough fall 

 of water, be placed about thirty centimetres above the surface 

 of the water in the basin. 



Advantages of this Machine. 



The feeding machine allows but little food to come to the fish 

 at short intervals. The food is therefore entirely consumed, and 

 consequently the danger of poisoning by putrefaction of the un- 

 eaten food on the bottom of the basin is very greatly diminished. 



The basin need not be cleaned very often. 



A rapid and equally developed growth of the fish is obtained. 

 Since, for example, the little machine conveys to the fish two 

 table-spoonfuls of food every two minutes, it follows that an 

 opportunity is offered even to the weakest fish to appease its 

 hunger. 



The water which falls on the little water-wheel, and by means 

 of which the machine is kept in motion, tumbles into the basin. 

 Thereby the water is separated and aerated, which is also of 

 great advantage to the fish. Thus it follows that this machine 

 is much to be recommended for those establishments which only 

 have spring water. 



The fact that feeding is made much easier by this machine, 

 so that fish culturists can use the same until the opportunity 

 comes to let the young fry free, appears to me very advanta- 

 geous. 



