HATCHING FISHES' EGGS IN JAES 187 



advance over tlie table system, as the jar over 

 the old floating-box. It enables at least a five- 

 fold increase in the annual output of fry, with 

 the additional advantage that it requires no 

 more water. For example, a building holding 

 two tables with a total capacity of 120 jars 

 would allow the setting up of two batteries of 

 the Alpena pattern, holding altogether 550 jars 

 and exactly the same amount of water. The 

 table is about 3% feet from the floor, about five 

 feet wide, with a tank about eight inches deep 

 set in the centre, the whole length, and having 

 an outflow-pipe at one end into the fry-tanks. 

 The jars are arranged in rows along the line 

 of the tank with a long rubber hose leading 

 therein from the outflow or siphon tube. The 

 water-supply is received through a two-inch 

 pipe suspended about three feet above the 

 table and tapped every six inches by quarter- 

 inch pet-cocks. The pet-cocks and the intake 

 glass tubes of the jar are connected by means 

 of rubber hose. 



