432 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



have been better than in 1874, amounting to from $1 30 to 

 $1 35 per dozen this year, as contrasted with $1 05 per 

 dozen last year. 



MARKED SALMON. 



It is the custom at the United States salmon-hatching es- 

 tablishment at Bucksport, Maine, under charge of Mr. 

 Charles G. Atkins, after stripping the spawn and milt from 

 the fish, to return them uninjured to the sea. Each fish is, 

 however, generally marked with a platinum tag, so that it 

 can be identified if it return. An extra price is offered to 

 fishermen for any of these tagged salmon. During the pres- 

 ent summer no less than seven of the fish so marked in No- 

 vember, 1873, were received by Mr. Atkins. Unfortunately, 

 however, only the wire band remained, the tags having been 

 worn off or destroyed in some manner. These were all fe- 

 males, in good condition, and well provided with spawn. 



SALMON IN THE SACRAMENTO RIVER. 



The run of salmon in the Sacramento River during the 

 season of 1875 has been something unprecedented, Mr. Liv- 

 ingston Stone, in charge of the United States salmon-hatch- 

 ing station on the M'Cloud River, stating, under date of 

 August 26, that, in a space of about a hundred yards by 

 thirty, five thousand salmon per hour could be seen jumping 

 out of the water. Mr. Stone has actually counted one hun- 

 dred in a minute, and has seen eighteen spring out of the 

 water at once. 



ANIMAL INCRUSTATION ON THE GREAT EASTERN. 



Mr. Henry Lee, in Land and Water, gives an interesting 

 account of his visit to the Great Eastern, for the purpose of 

 obtaining marine animals for the Brighton Aquarium from 

 the ship's bottom, which was about being cleaned of a vast 

 accumulation of organic matter. The principal mass of ad- 

 herent substances consisted of mussels, forming one dense 

 deposit covering a surface of fifty thousand square feet of 

 iron plates, and in some parts six inches thick. On the* 

 basis of an allowance of twelve pounds of mussels to the 

 square foot, which was considered very reasonable, it was 

 estimated that no less than three hundred tons were at- 



