330 
from par to smolt.” Previously, he had held a different opinion, 
believing the par not to be the young of the salmon, but was 
convinced to the contrary by Mr Suarpe. 
Suaw (Edinburgh New Philosoph Journal, 1836, page 99) com- 
municated certain experiments which he instituted on the par as 
to what its relations really were, for he had always believed it 
to be the young of the salmon. On July 11th, 1833, he caught 
seven pars, and put them into a pond supplied with a stream of 
wholesome water. In April, 1834, they became of a beautiful 
blue on the back, and a delicate silvery appearance on the sides, 
while the scales came readily off on their being handled. In 
March, 1835, he took twelve more pars, averaging six inches 
each in length, from the river which took on the smolt dress in 
April, 1835, which species he concluded these fish to be. “The 
salmon fry has hitherto been erroneously supposed to grow to the 
size of six or eight inches in as many weeks, and to take its 
departure for the sea after this brief period has elapsed. The 
rapidity with which the par of two years old assumes the 
appearance of the salmon-fry has led to this error, the par 
taking about the same time to perfect its new dress, as the 
young salmon is supposed to take in attaining the growth at 
which it has arrived at the period of its migration.” In May, 
1834, he caught some young about one inch in length with a 
gauze net, and put them into two separate ponds provided with 
a proper supply of running water. In May, 1835, they averaged 
34 inches long, and corresponded to the par of the river, and in 
the second week of that month assumed the smolt living and 
measured about 63 inches in length each.. On January 10th, 
1836, he saw a female salmon about 16lbs. weight, and two 
males of at least 25lbs. engaged in depositing their spawn, and 
three days subsequently he obtained ova from the spot where 
he had observed these fishes, and which ova he placed in gravel 
under a stream of pure spring water. On April 8th he found 
they had hatched, and after 140 days more corresponded with 
the little fishes he had taken in May, 1834. In January, 1836, 
he took a male and female salmon, apparently from 16lbs. to 
20lbs. in weight, and which were in the act of spawning, he 
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