380 PIKE AND OTHER COARSE FISH. 



near their spawning time as possible, and are taken out again 

 as soon as the spawning is finished. The fish deposit the spawn 

 on the branches. It is of great importance that the sides be 

 well perforated, to ensure free circulation of the water. We use 

 these boxes chiefly for perch, but they can also be used, with 

 some modifications, for other fish.' 



It is an easy matter to transport spawn which has been 

 obtained in this way to almost any distance, as it adheres to 

 the boughs ; so that you can either let the fry develop in the 

 box, and then go free in the water you desire to stock, or you 

 can carry the fertilised spawn to some place, perhaps a hundred 

 miles away, and then place it in a similar box in the water you 

 desire to stock. In a week or ten days' time the fry will hatch 

 out in countless numbers, and must then be liberated and 

 allowed to begin their fight for life alone. In the Swedish ex- 

 hibit in the Fisheries Exhibition, some models of Lund's box 

 were displayed. These models were exhibited in the Berlin 

 International Fisheries Exhibition, and are thus referred to, in 

 the German Official Report on that Exhibition, by Dr. Haack, 

 director of the great fish-breeding establishment at Huningue. 



In dealing with the Swedish exhibit he says : ' In the 

 Swedish exhibit there were two insignificant-looking models, 

 which were quite overlooked by the majority of visitors, but 

 which were of the very greatest interest to every thinking pisci- 

 culturist These models, in spite of their simplicity and insig- 

 nificance, show us the way \ve, in future, most simply, easily, 

 and inexpensively may carry on the propagation of our summer- 

 spawning fish to any extent.' He then describes the manner in 

 which the box is used, and refers to its advantages as follows : 

 ' As will be evident to every one, the eggs which have been 

 deposited and impregnated in the box develop in a perfectly 

 natural manner . . . air, light, and sun are able to exert their 

 influences on the eggs in exactly the same way as if they had 

 been deposited on water-plants in the open water in the ordinary 

 way. Wind and waves can in like manner exert their benefi- 

 cial influence on the eggs, which at the same time are protected 



