354 FISHING IN AMEEICAN WATERS. 



land, in the Palatinate of the Rhine, and in the mountains and 

 elevated parts of Germany. For this object, he said, they 

 take by the head a female salmon in November or December, 

 or a trout in December or January, the times when these 

 fishes deposit their ova. These fish are held over a vase with 

 a quart of water in it, and by a light pressure on the abdo- 

 men downward, the female vents the roe. They then take a 

 male salmon, and rub his belly down with the palm of the 

 hand in the same manner; milt falls on the roe and mixes 

 with it, when it is placed in a running stream and covered 

 lightly with gravel, and after several months the fish hatch. 



The Course of Natural History, by Adamson, was repub- 

 lished in Paris in 1845, when its information on fish-culture 

 first attracted attention to the truths published by him sev- 

 enty years previously. 



The copy of the manuscript of Jacobi was sent to France by 

 German officials, and thus became finally translated. Those 

 who are educated to be courtiers or politicians do not always 

 read. Apropos of this truth : the artificial fecundation of 

 roe by Jacobi, imparted through his intermediates, the Count 

 de Goldstein and the naturalist Gleditch, became neglected 

 and forgotten. During sixty years no one dreamed of read- 

 ing the " Traite des peches de Duhamel" the veritable work 

 of Jacobi. The end of the eighteenth century did not retain 

 a souvenir of the success obtained at Noterlem for the artifi- 

 cial multiplication " des Truites et des Saumons." 



If the Chevalier Bufalina, of Cesena, had succeeded in fe- 

 cundating several fishes, no one saw any novel feature in the 

 operation not developed by Spallanzani ; and if Jacobi had 

 in vented a successful plan of artificial fish-culture in Germany, 

 and if, in the region of the Rhine and in Switzerland, where 

 fishermen were successfully practicing fish-culture and enrich- 

 ing their streams by it, yet the world was as ignorant of its 

 true bearings upon the needs and prosperity of a country as 

 if nothing had ever been said or written upon the subject ; 

 so the progress may thus far be counted as nil. 



