App. E. Fry in pools. 291 



approximate idea of en % indicative of the largeness of 

 the amount of food the results obtainable from the pro- 

 destroyed, tection of fry. And against this re- 

 duction may be advanced the argument that by maturing 

 so many more fish, the number, which are to produce ova 

 in succeeding years will also be greatly increased. 



39. This, be it remembered, is the destruction of fry 

 computed to be still continuing. It was much greater 

 before the discouragement of the finely-twined cruives in 



the rivers, which alone must have 

 destroyed vast numbers. If the cal- 

 culation made in the preceding paragraph were applied 

 also to the fry spoken of in paragraph 20, there might 

 be conveyed a more adequate idea of the extent of the 

 destruction foolishly wrought. 



40. If then the machinery for destruction is so great, 

 and it is possible not only to stay its destructiveness, but 

 even to use it as a machinery for propagation, should not 

 the opportunity be availed of? 



Pry in Pools. 

 51. Before quitting the subject of fry it will be well 

 to guard against misconception on one point. It has been 

 said that the whole river is frequent- 



Para 33 



ly diverted into the rice fields, and 



that none of the fry in the rice fields escape destruction. 



It would be a not unnatural conclu- 



- Para 34 



sion that it is meant to be conveyed 

 that all the. fry in the river are thus destroyed; and so 



37* , 



