40 INCREASE OF WEIGHT IN CARP. [PART I. 
of about every four, yielding a supply sufficient 
to maintain, unaided, an adequate stock. To ob- 
viate this difficulty Mr Maltby purchases the stores 
of Carp requisite to keep up his supply, when 
they are two years old, the weight of each being 
then from two to four ounces, and their price thir- 
teen to fourteen francs a hundred. These he puts 
into one of the three smaller ponds, and allows 
them to remain there for a year, by which time they 
have attained to about three-quarters of a pound 
each. They being then rather too large mouth- 
fuls for ordinary sized Jack, he transfers them to 
one of the larger pieces of water, either La Hulpe 
or Boilsfut. After having been a year in these 
new quarters they are found to have increased in 
weight from three-quarters of a pound to from 
two pounds and a half to three pounds and a 
half each, according to the health of the individual 
fish ;—there being in fact no extraordinary increase 
in the weight of Carp until they are three years 
old, when they progress rapidly, until they attain 
that of about six pounds. After that they do not 
appear to continue to do so in a similar ratio. 
Those of the largest size mentioned, twenty-five 
and thirty-three pounds, he considers to have been 
about fifteen or twenty years old; having how- 
