412 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



fishes readied tlieir destination in good order, the low temperature of 

 the night being greatly in their favor. Though furnished with an ample 

 supply of ice, through the kindness of Mr. A. H. Lee, of Allentown, its 

 use was not necessary, the temperature of the water never exceeding 65°. 



I returned home via Pittsburgh, Harrisburgh, and Reading, arriving 

 at camp June 28. Here I found all operations suspended. The erec- 

 tion of a dam by the Delaware and Earitan Canal Company at Bull's 

 Island, with a chute of only 25 feet, had completely stopped the ascent 

 of shad. A number of spent fishes upon their way down the river were 

 taken, but the ascending spawners had disappeared. Upon my giving 

 my assent, camp was broken June 29. Messrs. Holton and Green left 

 for home on the following day. I remained until July 1, when I also 

 left. 



Such, sir, is a synopsis of my proceedings while in your employ. I 

 have made numbers of observations upon the food-fishes of our rivers, 

 which, with information obtained from various sources, I hope to pre- 

 sent in a future supplementary report. A small collection of the fishes 

 of the Delaware was obtained, and arrangements made for a more com- 

 plete set. 



I am, sir, respectfully yours, 



J. H. SLACK, M. D. 



Prof. S. r. Baird, 



Portland, Me. 



Beport of shad and shad-spawn taken at Camp Baird, 18T3. 



