284 Fortieth Annual Meeting 



temperature of 45° F., and as the temperature of the 

 hatchery water was 57° about an hour and a half was spent 

 tempering the eggs and getting them into the jars. 



The hatching arrangement available consisted of six 

 open-top jars each having a flow of about one gallon per 

 minute, emptying into a trough 13 inches wide, 11 feet 

 long, and with water raised to the depth of six inches. The 

 eggs began to hatch at once and, to keep shells away from 

 the foot-screen, an additional screen, about three feet long 

 made of mosquito-net with a frame fitting the trough, was 

 placed in the trough, its up-stream end on the bottom and 

 its other end just above the surface of the water. All 

 seeming safe at 9 p.m., the apparatus was left to run itself 

 over night. At 5.30 next morning the trough was running 

 over. The foot-screen was evidently clogged and an attempt 

 to clean it with a brush showed that it was clogged with 

 fish rather than with shells. 



Another long screen was made of cheesecloth and put in 

 place of the one made of netting, which was moved further 

 up the trough to intercept shells, the new one being designed 

 to fence fish away from the foot-screen. The fish belovr 

 the new screen were then siphoned out of the trough and 

 held in cans until shipped that afternoon, a lot estimated 

 at 400,000 being sent out 31 hours after the eggs were 

 received. 



For cleaning the screen and lower end of the trough the 

 plan was adopted of siphoning about once an hour, the fish 

 thus collected being held in cans, if the hour of shipment 

 were near enough, otherwise in a second trough fitted up t© 

 receive them and provided with a flow of about one gallon 

 per minute. The fish continuing to hatch rapidly and finding 

 their way past the long screens, it was found necessary to 

 tend them day and night to avoid clogging at the foot- 

 screen. 



The young fish were from the first able to go where they 

 pleased, so well able in fact that they found their way past 

 the long screens and even past the foot-screen occasionally, 



