STOCKING 407 



disease is believed to be contagious, but I have grave 

 doubts whether thoroughly healthy fish are liable to 

 catch it, and, on the other hand, unhealthy ones are 

 almost certain to contract the disease when it is pre- 

 valent in the stew or in the river. 



A small trammel-net is needed to pick up the trout 



from the stew, but when using 



Netting fish from it the greatest care is neces- 



the stew. sary. Trout generally get 



badly meshed in a trammel- 

 net, and extracting them from the pockets formed by 

 the sheeting or linnet being driven through the large- 

 meshed walling is a delicate operation. It is, of course, 

 better to construct stews so that the water-supply can 

 be diverted and the stew emptied before picking up 

 the fish, but this is in many cases impracticable owing 

 to the fall or difference of level being insignificant. 

 I am almost tempted to descant at length on this 



attractive subject. IVansplant- 

 Transplanting fly. ing a particular species of 



insect from one stream to 

 another, or from one part of a stream to another part 

 of the same stream, seems a fairly simple matter. 

 The tyro would say : Take eggs or larvae and convey 

 them rapidly to the place where they are to be intro- 

 duced, and if your judgment of the environment is 

 sound, the problem would apparently be solved. In 

 Part I, Chapter IV, " Choice of Pattern," when refer- 

 ring to the grannom, I have written on the subject : 

 The experience of most enthusiasts who have at- 



