436 ANNUAL RECORD OE SCIENCE AND INDUSTRY. 



and various species of the flat-fish, such as the sole, turbot, 

 brill, and plaice. All these were found to thrive admirably 

 well, and to increase in numbers, the gray mullet especially 

 havino" bred as freely as in the sea itself. The experiment 

 was continued for many years with the most favorable results. 

 According to Mr. Arnold, it was thought that hybrid fishes 

 were produced in this way, as several were taken in the vicin- 

 ity unknown to fishermen well acquainted with the species 

 on the coast. He adds that the sea-fishes, after being natu- 

 ralized in his lake, were transported to ponds of spring water, 

 where they not only lived, but did well. Such fish were ap- 

 parently more tenacious of life than those caught in the sea, 

 and were more capable of resisting successfully the injurious 

 effects of transportation in a small quantity of water for long 

 distances. 11 A, August 23, 1831, 126. 



SIXTH EEPORT OF THE MAINE COMMISSIONERS OF FISHERIES. 



The sixth annual report of the Commissioners of Fisheries 

 of Maine, for 1872, has just been published, and contains an 

 account of what has been done by these officers in the prose- 

 cution of their trust. In a state where the increase of the 

 present reduced stock of salmon has received so much atten- 

 tion, the subject offish-ways would naturally be of prominent 

 interest; and the Commissioners report an examination of 

 numerous localities, with a view either of determining the de- 

 ficiencies of the fish-ways already established, or the places 

 where they should be erected. 



They render their acknowledgments to Mr. Brackett, one 

 of the Fish Commissioners of Massachusetts, for furnishing to 

 them plans of what they consider to be the best arrangement 

 of the kind that has hitherto come under their notice. They 

 state that a new fish-way has been built at Dennysville by 

 Messrs. Lincoln, to replace an imj^erfect one previously erect- 

 ed. The fish- way at Milltown was kept open by the joint ef- 

 forts of the fish-wardens of Maine and New Brunswick. They 

 recommend the improvement of the fish-way at Orono, which 

 is the only passage for the salmon of the Penobscot to the 

 upper waters of the river, so as to make it accessible to shad 

 and alewives. 



In 1871 a number of salmon eggs were obtained by Mr. At- 

 kins at his establishment at Orland, on the Penobscot, which 



