APPENDIX I. 



2/9 



were killed, the bare spots healed over, and the trout got 

 well. Others were tried; some died and some lived. 



a Microscopic parasites which attack trout fry ; b Water insects supposed 

 to be destructive to trout eggs. 



From all which circumstances we may, I think, draw the 

 following conclusions : That it is the worm, and not the 



