has frequently observed rearing ponds in which the water was actually thick with copepods and 

 other forms, so tliat the fry had only to open their mouths to obtain all necessary food. The pond 

 is stocked with fry at the rate of 40 to 50 for the oranda and wakin or 20 to 25 for the ranchu 

 to each square foo' of surface. Should the supply of "mijinko" be inadequate for the rapidly 

 growing fish, one or more of tlie various other foods mentioned must be provided. These are not 

 scattered broadcast over and through the pond but are placed on shallow earthenware plates or 

 trays, about 9 inches in diameter and provided with a rim, that are suspended by 3 cords from 

 bamboo poles stuck in the bottom of the pond. The trays are arranged about the margin of the 

 pond at depths corresfionding with the movements of the fry. The very young fish can not with- 

 stand much pressure, and remain near the surface, so that the food is submerged only 1 or 2 inches ; 

 but as they grow they are able to go deeper and by winter take their food from trays 10 to 

 12 inches below the surface. The great advantage of this method of administering food is that 

 the unconsumed portion may be withdrawn and is not left to decompose, pollute the water, and 

 perhaps injure the fish if eaten. 



The foregoing description applies to the ordinary operations at a Koriyama goldfish farm. 

 When the rearing is conducted in concrete ponds, as is sometimes the case with the ranchu, a daily 

 change of water is necessary, and it is customary to use as the principal food the chopped larvae 

 of mosquitoes (Culc.v). Given a concrete pond with a surface area of 100 square feet, there may 

 be reared in it 100 ranchu under one year old, 30 under two years, 10 to 12 under three years. 

 If, however, the number of fry is reduced one-fourth or one-third, the results are much better, 

 and the fish may attain in one 3'ear a size that would otherwise require two years or more. 



The fry of the oranda variety hatched in a concrete pond of 100 square feet need frequent 



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