BuL. U. S. B. F., 1908. 



Pl,ATK LXXX. 



't li;iU li.jiy at I'lU-iii l'.a\', Ulii' >, ^li'>\viii- lour balU-rics and tlit 

 iiitu which the fry are carried by the flow from tlie jars. 



laiik-> i^teft fureyruundj 



Fig. S.— Downing jars set up for nse on "batter>'" 

 at Put-in Bay station, Ohio. The troughs into 

 which tlie water flows from the pitcher mouth of 

 the jars serve also to supply the jars in the next 

 tier, by means of the wooden faucets, and there is 

 a small overflow at alternate ends of each trough. 

 This is the common equipment for hatching white- 

 fish and pike perch. 



