270 



U. S. BUREAU OF FISHERIES 



supplied by i^-inch pipe. Glass hatchery jars of the McDonald type 

 are used for eg^s that need to be kept in motion. 



The methods employed in the hatching of fish eggs of various 

 species are of decided interest to visitors. The hatchery has been 



operated virtually without expense to the aquarium, fish eggs being 

 supplied from national hatcheries by the Bureau of Fisheries, and 

 the young fry removed to public waters by the State fish-cultur- 

 ist, who is always ready to accept them. The yearly output of fry 

 at the New York Aquarium since 1903 has averaged between 

 4,000,000 and 5,000,000. 



