THE ARTIFICIAL INCUBATION OF OVA. 



53^ 



since for the Thames Angling Preservation Society' 

 when I was on the Piscicultural Committee of the 

 Society, he will at once- understand what I mean 

 (1) Is the reservoir, and (2) the zinc shoot. This 

 shoot should be projected as far into the inside of 

 the cistern as it is on the outside, as much rubbish 

 will thus be .prevented from finding its way into the 



shoot. Under this shoot should be placed a long 

 box, three parts full of fine gravel The boxes we had 

 made were of elm, weU seasoned. In the ends were 

 deep cuts, of nearly the entire width of the box. The 

 upper end (4) was defended by perforated zinc, and 

 over the outside of this was fixed a tray (3), which 

 caught the water. The water ran over the gravel 

 through the box, and through another zinc shoot into 

 another box, which fitted on to the end of the first 

 with a slight fall from the first to the second, in 



