422 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



distance from the water into which they were to be intro- 

 duced, the work was done about two miles from Easton, with 

 the successful result indicated. Mr. Norris is quite confident 

 that, whether salmon have ever lived in the Delaware or not, 

 there is every probability of their finding a suitable home 

 there, and of becoming abundant in future years. In his com- 

 munication to the Germantown Telegraph, from which we have 

 quoted, Mr. Norris remarks also that the black bass experi- 

 ment in the same river promises to be a complete success. 

 Large numbers of young fish have been seen all along the 

 river shore in the neighborhood of Easton, and the old fish 

 have been found in many places on their spawning beds. 

 Letter. 



SALMON AND TROUT IN AUSTRALIA. 



The question of the occurrence of salmon in Australia still 

 seems to lack the evidence of actual capture, although large 

 numbers offish have been seen in the Derwent and other riv- 

 ers, which by their movements could scarcely be assigned to 

 any other species. Mr.Yaul, however, in a communication to 

 Land and Water, remarks that the eggs of the brown trout 

 (Salmo fario), placed by him in the Derwent, have produced 

 thousands of fish, and that they are now frequently taken 

 weighing from three to five pounds each. He adds that both 

 salmon and salmon-trout (S. salar and S. truttd) have bred in 

 the ponds in fresh water, never having a chance to migrate 

 to the sea, and that they have suffered no inconvenience from 

 this restriction. 2 A, March 2, 1872, 152. 



SPAWNING OP HERRING. 



Mr. Matthews Dunn, whose contributions to Land and Wa- 

 ter, in regard to sea-fish and their reproduction, have con- 

 tained much of interest, writes in reference to the spawning 

 of herring, and remarks that during the past winter he took 

 occasion to impregnate some herring eggs, and found that on 

 placing them in water they sank immediately to the bottom, 

 or became attached to the sides of the vessel by a tenacious 

 viscid coating. He thinks that the roe discharged on the 

 British coast in January and February are usually hatched 

 out by the 20 th of May. 



The sea-fisheries of Great Britain appear to have been un- 



