CHAPTER XIII 



HATCHING FISHES' EGGS IN JAES 



Thb national and state institutions hatch, in 

 glass jars the bulk of the hundreds of millions 

 of fish -which they plant every year. The eggs 

 of nearly all fresh-water and anadromous 

 fishes, excepting the trouts and salmons, are in- 

 cubated in this manner. No discovery yet 

 made in fish-culture has equalled that of the 

 hatching-jar. It has made possible fish-culture 

 in such huge proportions that the work to-day 

 is bounded only by the size of the hatching- 

 plants and the amount of money available to 

 secure eggs; and it has enabled national and 

 state governments to take up "field work" on 

 a scale commensurate with its importance, and 

 through it to save and hatch the almost count- 

 less millions of eggs of ripe fishes caught in 

 nets by the commercial fishermen which pre- 



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