OE, THE HOME-CE LTUKE OF FEESH-WATEE PLANTS. 
boldt and Bonpland perceived fishes thrown np alive 
and in apparent health from the bottom of a vol¬ 
cano, along with water heated to a degree that raised 
the thermometer to 210°!—being only 2° below boil¬ 
ing point. This proves, at all events, that water of a 
tepid heat would be highly favourable to Gold Pish, 
and perhaps to many other species; and if the breed¬ 
ing and rearing of fish for the table were more at¬ 
tended to, it might be found that all the fresh-water 
species could be made to multiply more abundantly, 
grow more rapidly, and attain a larger size, by the 
judicious introduction of warmth to parts of ponds 
or streams, which might be easily effected near to 
dwellings where forcing-houses are in operation, by 
means of an extended range of hot-water or steam 
pipes being made to pass through the ponds, or parts 
of the adjacent streams.* 
Pennant tells us that in China every person of 
taste keeps Gold Pish, and that they make the 
crossing of the several distinct species quite a 
scientific business. They also succeed in taming 
them, so that they will come to the call of a whistle 
* Pish also bear a great degree of cold, though it is not pre¬ 
tended that they flourish in it; it is said that Perch that have 
' been frozen up in solid ice have recovered when thawed before 
the fire. 
85 
