FISH HATCHING ON A MODEST SCALE 423 



is placed at the intake and a screen at the outflow, and 

 that these boxes are fed in addition by the spray water- 

 piping already described, enough has been said to give 

 an idea of both systems. There is only this to be added, 

 that all woodwork must be carefully charred ; that every 

 separate piece must be carefully smoothed and exactly 

 fitting, without the least projection or crevice ; and that 

 all zinc should be varnished by a special varnish, which 

 can be obtained from any of our commercial hatcheries. 



Let us assume now that everything in the hatchery 

 is prepared for the reception of the ova. All the taps 

 are in working order, ready to be turned on or off as 

 occasion requires ; a steady flow is left running ; the 

 escape pipes are clear of obstruction, and the glass grilles 

 (or the baskets) are all in their places submerged to the 

 proper depth. I f the weather is specially severe, we have 

 provided a small oil stove to keep the temperature of 

 the house above freezing-point. Candles or stable lamps 

 are also at hand, as the winter day gives brief light to 

 work by. 



It had been reported (we shall suppose) that the fish 

 would likely be on the redds that afternoon, and now the 

 dogcart, or, better still, the motor car, is awaiting orders 

 ready to start at a moment's notice, as we have some little 

 distance to travel. Our head man has meantime been 

 putting aboard the vehicle four white enamelled tin 

 basins of 1 5 in. diameter, a couple of white enamelled 

 tin pails with lids, and two or three kitchen towels, the 

 use of which will immediately appear. Our man has 



