420 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



Mr. Stevenson has had constructed, for the use of the Chal- 

 lenger exploring vessel, as also for the Scotch station, an ap- 

 paratus for these observations, by which a maximum and a 

 minimum thermometer are immersed continually under the 

 water, thus insuring the securing of the absolute extremes of 

 the temperature extremes which would most likely be miss- 

 ed if observations were taken only at great intervals. The 

 Marquis of Tweeddale, in 1872, proposed that the society 

 should enter upon the investigation of the migrations of 

 fishes, and particularly those of the herring, in connection 

 with sea temperatures and weather generally, and stated that 

 it was in his opinion likely that the herring followed belts 

 of water of a higher temperature than that of the sea gener- 

 ally. The statistics of the herring catch during the last two 

 years has been, in consequence, made the subject of two elab- 

 orate reports by Mr. Buchan, secretary of the society, and 

 positive results of considerable value are anticipated. The 

 subject has also actively engaged the attention of the United 

 States Commissioner of Fish and Fisheries, at whose request 

 the Army Signal -office, some two years ago, instituted a 

 similar series of observations of sea temperature, and who has 

 moreover suggested that it may, through the admirable or- 

 ganization of that office, soon become possible to predict from 

 day to day the migrations of shoals of the more important 

 classes of fishes. 12 A, IX., 346. 



MARINE FISHEEIES OF MAINE IX 1873. 



According to the Gloucester Telegraph, the total value of 

 the cured and packed herring, cod-fish, haddock, pollock, and 

 mackerel in Maine last year will approximate $800,000, giv- 

 ing employment to not less than 550 men. In catching cod 

 and mackerel 861 vessels are employed, aggregating 46,196 

 tons' burden. 



CONSUMPTION OF MARINE PRODUCTS IN WASHINGTON. 



Some idea of the extent to which the products of the sea. 

 enter into the food consumption of a city may be gathered 

 from a recent report by Mr. C. Ludington, inspector of this 

 class of articles of food for the citv of Washington. 



According to this account, during the year extending from 

 October, 1872, to September 30, 1873, the number offish sent 



