20 



sufficient incline to ensure a good current of water passing 

 through. Five sets of these boxes were obtained, which 

 gives us acconnuodation for at least 25 millions of cod 

 eggs, each box holding with ease 500,000 eggs. In the 

 case of plaice eggs 300,000 can be incubated in each box. 



In order to make room for the new apparatus, the 

 movable tanks, &c., were removed into the adjoining 

 verandah, which had been enclosed and sufficiently lighted, 

 and to which an entrance had been made from the tank 

 room. A wooden bench running along the whole length 

 of the new room was fitted up, on which were placed 

 the smaller tanks and other apparatus. This left the 

 whole floor of the tank room free for the Dannevig boxes, 

 which were placed in position with the necessary supply 

 pipes from the filter, a branch being also led into the new 

 room. It is usual when hatching operations are going 

 on to have the movable boxes rising slowly and falling 

 rapidly once every half minute. This keeps the eggs 

 moving and prevents them from gathering together in 

 masses on the surface. During the past season no move- 

 ment was given, but in future, motion will be used for at 

 least some of the boxes. There is still room for some 

 additional sets of apparatus, which can be added when we 

 have better facilities for collecting the eggs. 



The three . wooden tanks, used in previous hatching 

 work, were also fitted with floating boxes, each box being 

 of the same capacity as those of the Dannevig set, but in 

 this case there was a separate jet of water to each box, 

 the method adopted in America. 



As soon as the whole apparatus was ready for work — 

 about the end of January — the crew of the steamer com- 

 menced to look out for eggs. They visited the spawning 

 grounds and trawled with the steamer's gear, and also 

 bo£i,rded the commercial trawlers in order to examine the 



