APPENDIX. 287 



so probably I may have to trouble you again for further 

 information. 



XT. 

 DR. J. H. SLACK'S TROUT-BREEDING ESTABLISHMENT. 



The three illustrations, "Trout Dale Spring," "Trout 

 Dale Hatching-house," and "Trout Dale Fish Ponds," 

 appeared originally in the June number of " Harper's 

 Weekly." The publishers of this book purchased the 

 plates, which, with some little alteration have been made 

 to contribute to the ornate appearance of this appendix. 



This establishment is in Warren county, New Jersey, 

 near the Musconetcong creek, about a mile and a half from 

 Valley station, on the Central Railroad of New Jersey. 

 It is nine miles east of the town of Easton, Pennsylvania, 

 and sixty-five miles west of New York. It was commenced 

 by the writer in May 1866, and sold in an uncompleted 

 condition to Dr. J. H. Slack, in September 1867. 



The spring discharges something over a thousand gallons 

 per minute; which is about one-third the flow of the Ingham 

 spring, where the writer is about to construct another trout 

 factory. The water is uniformly at 50 winter and summer. 



The hatching-house is in accordance with the plan in 

 the third chapter of this book. So, also, are the ponds 

 (which lay parallel to each other in front of the hatching- 

 house) such in their proportions, as I have recommended. 

 Dr. Slack's success, as well as that of others who engage 

 in the business, will depend much on that careful attention 

 to details which I have so strongly urged. 



