animal besources and fisheries of united states. 245 

 7. Propagation of reptiles. 

 methods ol' lerrapiia ciiBture. 



8. Propagation of ajmphibians. 

 Methods ol* iVog fullure. 



9. Propagation and culture of fishes.' 



Accessories ol' obtainiiii^ and iiiipregiiating^ ova. 



Pans, pails, &c. 



Strait -jackets used iu spawning salmon. 



Spawning-race (Aiuswortli). 



Eoller si)a^NTiing-screeu (Collins). 



Spawning-vat (Bond). 



naichiiig'-appai'alus. 



26940. Wo. 19. Model of hatcLmg-liouse at United States salmuu-breediug 

 station at Bncksiiort, Me. Scale, J inch to the foot (4^). C. G. 

 Atkins. 



The hatchiug-tronghs are arranged in sets of four across the 

 building, and fitted with Brackett trays. The water enters 

 them from a feed-trough along the side of the room and es- 

 capes by j)ipes through the floor. 



Troughs : 



Plain. • 



Gravel-bottomed. 



With sieve-bottom trays. 



2693G. No. 20. Model of hatching-troughs and tr.ays in use at the United 

 .States salmon-breeding stations at Bucksport and Grand Lake 

 Stream, Me. Scale, full size. C. G. Atkins. 

 The eggs to be hatched are placed on the wire-cloth trays. 

 26935. Model of hatching-frame iu use at Grand Lake Stream, adapted t» 

 use in !X trough or iu an open stream. Devised by C. G. Atkins. 

 Scale, full size. C. G. Atkins. 

 The eggs are placed on all of the irays except the upper one. 

 The interstices, though too small for the escape of the eggs, 

 permit a change of water, and when the frame is shut it con- 

 fines the trays securely iu place. 

 26970. Model of hatching-apparatus for black-bass. John Eoth, Duncau- 

 non. Pa. 



Brackett's. 

 Williamson's. 

 Clark's. 

 Vats or cases : 

 Holton's. 

 Eoth's. 



' Many of these articles cannot conveniently bo exhibited. 



