ARTIFICIAL BREEDING OF SALMON. 



197 



wire-work, the same height as the sides, which are 

 strengthened by two transverse pieces of wood. All 

 the wood-work should be of well-seasoned material, 



Fig. 1. 



Fig. 2. 



and those parts which come in contact with the water 

 should be glazed, as any resinous or pitchy substance 

 in the wood would prove injurious to the ova. I should 

 mention that the first compartment into which the 

 water falls should be furnished with a network lid of 

 zinc wire, which forms the bottom of a framework 

 three or four inches high, so as to prevent the water 

 running into the next compartment except through 

 the holes in the zinc lid. Thus the larvae of destruc- 

 tive insects, worms, &c., will be kept out. The upper 

 end of the case should stand two inches higher than 

 the lower end. The water which runs out from the 

 last compartment is prevented running out the whole 



