BD Fisurya 1x American 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 hght 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 
tirst attracted attention to the truths published by him sev- 
cuty 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 éntermediaires, the Count 
de Goldstein and the naturalist Gleditch, became neglected 
and forgotten, During sixty years no one dreamed of read- 
ing the “Zraité des péches 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 
invented 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 220. 
