LIII 



west oi tlie hatching-liorise, wliere it is exposed to tlie 

 action of the snn and atmosphere and reaches a very 

 higli temperature during the heated term. 



Hitherto we had found it imjjracticable to keep the 

 salmonid^o in these small ponds except in comparatively 

 cool summers. I determined, however, to make another 

 effort to keep over the fish referred to, but am now satis- 

 fied that these ponds can be better utilized for the rear- 

 ing of other varieties which do not require such cold 

 water. Almost all of the hsh reserved for this experi- 

 ment died during the summer. 



Salmon — 8almo salar. 



^'here were also on hand at the hatcliing- house sixty 

 thousand eggs of the Penobscot salmon, which com- 

 menced to hatch on the lOtli of the month, the hatching 

 being completed by the 15th of February, when all the 

 young fish were free from the ^^g. As this variety had 

 been so successfully introduced into the Delaware River, 

 and a few adults had been taken in the Susqnehanna 

 River on their return from the ocean, I deemed it ad- 

 visable to secure as many eggs as possible for the princi- 

 pal waters of Maryland, and the U. S. Commissioner 

 generously furnished us with the sixty thousand above 

 mentioned, for the waters of the Susquehanna and the 

 Potomac, as it was thought best to put all the fish into 

 the tributaries of these two streams. It was arranged 

 with the Commissi(mers of Pennsylvania, therefore, that 

 I should hatch at Druid Rill Park the iish intended for 

 the Susquehanna River, and that they should be trans- 

 ported to the headquarters of the Susquehanna by that 

 commission and deposited in tlie tributaries of that 

 stream. In accordance with this arrangement, on the 

 2'^rd of March I delivered to Mr. J. P. (h'eveling, the 

 agent of the Pennsylvania (/(mimission, twenty-three 

 thousand of these tish, being the yield of one-half Of the 

 eggs received, to be disposed of as above indicated. I 

 apjjroved of this arrangement, as I was satisfied that the 



