66 DOMESTICATED TROUT. 



Fifty or over, at the rate of . . . . $3-5o 



Extra glass tubes (each) .05 



" " " per pound 75 



" Flight of Trays with Stand. 



" This is a neat and convenient form when several trays 

 are required. 



" The stands are made of the best seasoned white-pine, 

 neatly framed together. 



"Prices. 



There is another form of grilles used, which has 

 stood the test of experience very well. It consists of 

 very narrow strips of window-glass, laid side by side 

 in the hatching box, an inch or two from the bottom, 

 and closely enough to keep the eggs from falling 

 between them, but wide enough apart to allow the 

 hatched fish to fall through. Each alternate strip is 

 placed about an eighth of an inch lower than the rest. 

 In this depression the eggs lie until hatched, when 

 the young fish fall into the box or trough below. 

 The advantage of this class of grilles over the last 

 form is that they are cheaper. Another advantage 

 is that they can be used in water where too much 

 sediment would collect on tight grilles or in troughs, 

 the sediment being easily washed off the eggs on the 



* Dr. Slack's Catalogue of fishes, and apparatus used in fish 

 culture, pp. 4, 5. 



