made to the use at times of water from the gutters and ditches of the towns and villages; this 

 water, rich in organic matter, both living and dead, is run directly into the rearing ponds. Another 

 practice is to place in the ponds loose rolls of straw matting permeated with rice bran or the 

 lees of soy ; the fermentation that ensues finally promotes the growth of the desired Crustacea. 

 Another method is to put soy lees in a loose straw bag that is placed on the bottom of the pond, 

 with the same results as before, the crop of water fleas being ready for harvesting by the young 

 goldfish at the expiration of 4 or 5 weeks. Still another way of inducing quickly an abundant 

 growth of crustaceans is to inoculate the pond therewith ; a pint of these creatures placed in a 

 suitable pond of an acre or 1,000 to 1,200 square feet will multiply so rapidly that after 3 to 5 

 days many thousand young goldfish may be subsisted. 



For the more effective and extensive production of "mijinko," however, it is customary to 

 proceed somewhat differently. Supposing a pond to have a area of 1,800 square feet, there will 

 be placed in it rice bran, soy lees, or fresh horse manure to the amount of 4 or 5 bushels, the pond 

 having previously been drained ; for a recently constructed pond the quantity of fertilizer must be 

 increased and a combination of soy lees and manure may be used. After the bottom of the pond, 

 with the fertilizing substance spread over it, is exposed to the sun for 6 to 8 days, the water is 

 turned on and the pond is flooded. In a few days the color of the water becomes decidedly 

 green from the presence of unicellular algae in great abundance, and in 2 to 4 weeks the water 

 fleas will exist in such numbers that they will support many thousand young goldfish with con- 

 stantly increasing appetities. It may be necessary, however, to continue to apply fertilizer to the 

 pond at short intervals. 

 ^ The collecting of entomostraca from reservoirs and lakes for the newly-hatched fish in the 



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