4 ® 
OF FISHES IN GENERAL. 
are inhabitants of the fea ; fuch as the cod, ling, her- 
ring, pilchard, and fparling. The migrations of the 
herring are well known. In the months of June and July, 
it iffues in vail fhoals from the unexplored regions of the 
northern ocean ; furrounds the Britijh ifles, and enters the 
bays and arms of the fea. Thefe fillies are known to take up 
their refidence in i'ome particular loch or creek for eight 
or ten years, and then to refort to another for a fimilar 
period. The tytlie, the calfilh, the cod, and whiting* 
have all their feafons of migration. The laft, in parti- 
cular, are probably forced upon thofe iramenfe journeys 
from the coafts of America to thofe of Spain and Africa , 
to avoid the purfuit of the cod, and other rapacious 
invaders . 
From thefe obfervations, it would appear, that fifh of 
the fame fpecics are capable of living in very different 
quarters of the globe, and of enduring various degrees of 
heat and cold ; a circumflance which opens a vaft field 
for the enterprife and ingenuity of man in tranfporting 
them, and rendering them fubfervient to the purpofes of 
dorr education. It is impodible to determine to what 
length this operation may be carried, or to afcertain hoW 
great an accedion might thus be made to the fultenancfr 
of the human race. 
