Notice of Captain Parry's last Expedition. 147 



It may be further noticed, that not only did the fish in Mi- 

 Arnold's pond improve materially in quality, but the few 

 eels which were formerly almost its only tenants, have, since 

 the introduction of fish from the sea, increased incalculably in 

 number, and so as themselves to bring in a considerable re- 

 venue. The pond now produces a large rent, and is resorted 

 to for the supply of the market when the weather prevents the 

 boats from putting to sea. 



On the subject of Food for the supply of the fishes in such 

 ponds, Dr MacCulloch remarks, that, as far as this experiment 

 goes, it proves that fish may be fed " merely by bringing dif- 

 ferent kinds together, as is the case in nature." Minute a- 

 quatic animals and larva? abound in every piece of water, who 

 find their nutriment in matters invisible to the eye and impal- 

 pable to the touch. These again form the food of the smaller 

 fishes, aquatic helices, mytili, leeches, and the multitudinous 

 inhabitants of lakes ; and their fecundity is in general so great, 

 as not only to keep up the species, but afford a considerable 

 overplus for the food of others. Mr Pennant relates, that in 

 the fens of Lincolnshire, and some of the rivers that creep out 

 of them, the stickleback is produced in such quantity, that 

 once in seven or eight years they are forced to migrate. " The 

 quantity is so great," he adds, in one river, the Welland, " that 

 they are used to manure the land, and trials have been made 

 to get oil from them. A notion may be had of this vast shoal, 

 by saying, that a man employed by the farmer to take them 

 has got, for a considerable time, four shillings a-day by selling 

 them at a halfpenny per bushel." * But should the smaller 

 fishes, introduced or natives of the lakes, not afford a sufficient 

 supply, the same ingenuity which can reclaim fish from the 

 deep will be exerted with equal success in procuring them 

 food. 



Art. XXVIII. — Notice of Captain Parry's Last Expedition 

 to the Arctic Regions in 1824 and 1825. 



The return of Captain Parry from his last expedition to the 



Arctic Regions without having accomplished any of the lead 



* British Zoology, vol. iii. i>. :Jo3- 



