RIVER GARDENS; 
power is employed, the water becomes heated during 
some of the processes, and the mill-dams thus 
artificially Avarmed (sometimes to a very high tem¬ 
perature) have been found to he most favourable 
reservoirs for the breeding of Gold Pish. In such 
situations they have not only multiplied exceed¬ 
ingly, hut have attained to a much greater size than 
in ordinary waters, however well sheltered. In some 
cases referred to, the heat of the water appeared too 
hot for anything living to exist in; hut there are very 
extraordinary examples of the degree of heat in which 
fish will not only exist, hut thrive. 
Les Pontaines found a fish, the Spams of Lace- 
pede, flourishing in the hot springs of Barbary, in 
a temperature of 86° Pahrenheit, and other small 
fish, of the Mullet and Perch families, have been ob¬ 
served in these springs. Be Saussure found Eels in 
the hot springs of Savoy, which raised the thermo¬ 
meter to 113° Pahrenheit; while Bruce, in the hot 
baths of Teriana, perceived small fish resembling 
Gudgeons, the water being so hot that he was asto¬ 
nished they were not boiled. Broussonet made several 
experiments to ascertain the extent of the endurance 
of fish with regard to heated water, and found that 
many species would live for several days in water 
in which he could not bear his hand; and Hum- 
84 
