APPENDIX VII. 307 



45. Cross the various species of the Salmo family with 

 each other, and note and publish the results. 



46. Whoever has the opportunity, and sufficient pa- 

 tience, will render a great service to the fish-cultivating 

 world by fully testing the experiment of breeding in and 

 in with peculiar varieties of trout, as the Chinese do with 

 gold fish, and publishing the results. 



