92 THE OCEAN. 
some of the Hebrides there are large pools for the 
preservation of sea-fishes, hollowed out of the solid 
rock, and communicating with the sea by narrow 
clefts at high tide. Great numbers of Cod-fishes 
are kept in these vivaria, and are fed with various 
garbage, or the bodies of other fishes. The stock 
is replenished by casting in such individuals as are 
but slightly injured by the hook in fishing, while 
small ones, or such as are lacerated, are thrown into 
the same receptacle, as food for their more fortunate 
brethren. There are two modes of capturing the 
Cod with the hook: the one is with what are called 
in Cornwall bulters, which are long lines, to which 
are attached, at regular distances, other lines six feet 
in length, each bearing a hook; the intervals are 
twice the length of the small lines, to prevent their 
intertwining; these are shot across the course of the 
tide. The other mode is by hand-lines, of which 
each fisherman holds two, one in each hand, and 
each line bears two hooks at its extremity, which 
are kept apart by a stout wire going from one to the 
other. A heavy leaden weight is attached near 
the hooks, and thus the fisherman feels when his 
bait is off the ground. He continually jerks them 
up and down, and is thus aware of a fish the moment 
it is secured. Although this seems a somewhat 
tedious process of fishing compared with the im- 
mense draughts of the net, it is found in skilful 
hands to be productive: eight men on the Dogger- 
bank have taken eighty score of Cod ina day. It 
is a heavy fish: Pennant records one which weighed 
78lbs., but this was a giant; it was sold at Scar- 
