Foster. — White Perch Propagation 165 



that white perch eggs will not stand the drop in temperature 

 necessary to this method of packing. 



Efforts were also made to hold small lots of eggs for 24 hours, 

 in a vacuum bottle, but the eggs were dead when removed from 

 the bottle, presumably from lack of aeration. 



Owing to their cannibalistic tendency it is well to distribute 

 the fry shortly after hatching. A convenient and accurate method 

 of securing the proper number to the can is to take down the 

 jars just as they commence to hatch and measure the required 

 number of ounces of eggs to the can. By gently stirring every 

 half hour, equally good results will be obtained as if the eggs were 

 permitted to hatch in the jars. By giving the water in the cans 

 a swirling motion all shells and dead eggs will collect in a little 

 bunch on the bottom of the can where they may readily be 

 removed with a siphon. 



The usual number carried to a 10 gallon can is 200,000. For 

 trips of more than 10 hours' duration, however, 100,000 to the can 

 will be found to carry better and give the messenger less trouble. 

 The same methods of aeration and temperature regulation should 

 be followed as that described in the transportation of eggs. With 

 100,000 to the can little if any aeration will be necessary and unless 

 the hatching temperature is above 65, a 5 degree rise in tem- 

 perature will be found advantageous. 



A bright tin or white enamel dipper will show more clearly 

 the almost transparent fry and assist the messenger to convince 

 the applicant that the water in the can contains fish, otherwise, 

 as told by a fish culturist of note, it will be necessary for him to 

 "Plant water and have faith." 



