194 THE TROUT 



By making use of a distributing trough you 

 can have several rearing-boxes compactly arranged 

 side by side, and if the natural fall is insufficient, you 

 can, by excavating the ground, create the required fall 

 for the water, and be enabled to raise the boxes on 

 trestles or blocks of wood to such a height as will 

 make it unnecessary for the operator to stoop to his 

 work. 



The side-by-side arrangement of the boxes is often 

 the only one which the height of your available head 

 of water will permit ; moreover, it economises space 

 and also saves time in feeding ; but, most important 

 of all, it enables each box to receive a supply of 

 water which has not immediately before been deprived 

 of much of its oxygen by passing through the gills of 

 fry in other boxes above. Very great care will have 

 to be taken to prevent the possibility of the water 

 supply being interrupted. 



The task of transporting the fry from one nur- 

 sery to another must be accomplished without remov- 

 ing the delicate little creatures from their native 

 element, an easy matter if only we call in the ser- 

 vices of our old and trusty friend the rubber syphon. 

 In a trice it will suck out as many as you wish into a 

 fry-carrier a vessel provided with a panel of perforated 

 zinc let in near the rim which allows the surplus water 



