1226 FISHERIES OF THE UNITED STATES. [72] 



ISTORTHVILLE HATCHING STATION. 



Photographic view of the left side of the Northville hatchery, used 

 by the U. S. Fish Commission for hatching eggs of the white- 

 fish, and, to a limited extent, for salmon eggs sent from Cali- 

 fornia, and for eggs of grayling and trout taken from fish kept 

 in the ponds at the hatchery. Size, 30 by 40 inches. Enlarged 

 by electric light from an 8 by 10 negative. Northville, Mich., 

 1882. (731)2,19.3. U. S. Fish Commission. 



NORTHVILLE HATCHERY. 



Photograph of the interior of the U. S. Fish Commission hatchery 

 at ISorthville, showing the apparatus employed in hatching the 

 whitefish and other species. Size, 30 by 40 inches. Enlarged 

 by electric light from an 8 by 10 negative. Northville, Mich., 

 1882. (736) 2,200. U. S. Fish Commission. 



Alpena hatchery. 



Photograph of the interior of the U. S. Fish Commission whitefish 

 hatchery, showing the apparatus employed in hatching eggs of 

 that species. Size, 8 by 10 inches. Alpena, Mich., 1882. (781) 

 2,236. U. S. Fish Commission. 



Sandusky hatchery. 



Photograph of the interior of the whitefish hatchery belonging to 

 the Ohio Fish Commission, showing the apparatus employed 

 in hatching eggs of the whitefish. Size, 8 by 10 inches. San- 

 dusky, Ohio, 1882. (735) 2,199. U. S. Fish Commission. 



Sandusky hatchery. 



Photograph of the interior of the whitefish hatchery belonging to 

 the Ohio Fish Commission, showing the apparatus employed in 

 hatching eggs of the whitefish. Size, 30 by 40 inches. En- 

 larged by electric light from an 8 by 10 negative. Sandusky, 

 Ohio, 1882. (735) 2,199. U. S. Fish Commission. 



Movable hatcheries. 

 Floating hatchery. 



Photograph of the hatching barge and steamer Fish Hawk belong- 

 ing to the U. S. Fish Commission, and employed in hatching 

 shad and other species of food-fishes. Size, 8 by 10 inches. 

 ' Havre de Grace, Md., 1882. (664) 2,149. U. S. Fish Commis- 

 sion. 



Hatching barge. 



Photograph of the interior of TJ. S. Fish Commission hatching 

 barge employed in the shad-work in Maryland, Virginia, and 

 North Carolina. The barge is a floating hatchery, being pre- 



