344 ANNUAL OF SCIENTIFIC DISCOVERY. 



then stage of progress as to lead to well founded hopes that by a little 

 care and exertion, every brook and rivulet might be made to afford a 

 large increase to our means of subsistence. 



The place where at the present time the principal experiment is in 

 progress is the village of Huningen and its environs, in Alsace, a few 

 miles from Basle, in Switzerland. The French Government, a few 

 months since, loaned 30,000 francs to MM. Berthot and Detzem, to 

 enable them to make all needful preparations and arrangements to 

 carry on the experiment at this place on a scale that should prove 

 decisive. The Superintendent of this establishment, M. Coste, made 

 a report in February last to the Academy of Sciences upon the pro- 

 gress which he had made, which is published in full in the Polytechnic 

 Journal, for 1853. 



His treatment of the spawn of salmon and trout had proved so sat- 

 isfactory in its results, that he has no doubt of having by June, that is 

 in four months from the date of the report, 600,000 young fish of these 

 two species with which to furnish the rivers, all sufficiently grown to 

 be secure from the ordinary dangers to which the minnow is exposed. 

 In the brooks of Huningen in which the spawn is hatched, over a mil- 

 lion of salmon and trout eggs have been placed, of which 120,000 

 were spawned along the bank of the Rhine, under the eye of the 

 Director. 



The enormous productiveness of this establishment may be imagined 

 when a year's space is taken into consideration, for no sooner are the 

 present varieties of fish distributed from the brooks and ponds, than 

 their places will be supplied by the young of the Danube salmon and 

 shad, which spawn only in the spring, thus keeping up a constant suc- 

 cession. 



This new branch of industry is already spread at Huningen, over a 

 space some 7^- miles in extent, where the waters of ten natural foun- 

 tains, that of a small stream passing through the establishment, those 

 of the -Rhine and the standing waters of marshy ground, are all found 

 near each other, and at hand to mingle in such proportions as may be 

 necessary for different species. Hopes are entertained that sturgeon 

 and other fish, which require the sea and fresh water by turns, may 

 thus be raised, and that by placing them in the Rhone when young, 

 the bays of the Mediterranean may once more be stocked with fish. 



Successful experiments have been also made upon the shores of the 

 Adriatic, in the Pontine marshes, and in the Gulf of Naples, in the 

 artificial production of salt Avater fish. 



MARINE VIVARIUM. 



A new feature has lately been added to the London Zoological 

 Gardens, namely, an arrangement for the purpose of exhibiting and 

 preserving marine animals. It consists of a number of large tanks, 

 mainly constructed of glass, to which the name of Marine Vivarium 

 has been given. A difficulty which has always been encountered in 

 all attempts to preserve marine animals at a distance from the ocean, 



