120 The Salmon 
of the number of dead diseased fish in different rivers that one 
frequently reads, do not 
give an adequate idea of the 
numbers that die, for when a 
flood comes it sweeps them 
down in thousands, and they 
are Caniied Out -to_ sea oT 
left in the estuaries, and 
perhaps not one in fifty is 
noticed. All the season 
through diseased fish drop 
back daily, many of them 
reachinow thes sale. awater 
alives | se lone saseathe 
river continues low many 
Can 4oremain. im. cite bint 
when a flood comes they 
are unable to resist the 
Serene ote the sreurrent 
Whenever they lose con- 
trol of themselves they roll 
over and very soon die. 
If the disease died with 
them it would not be so 
serious, but weeks after 
death the disease continues 
to develop, until every part 
of the fish is covered to the 
depth of a quarter of an 

inch, ne ienenrS lahave 
Fic. 118.—Showing fungus developed after the fish was dead scraped away a part to show 
for a considerable time. See two parts scraped off. ; 
the thickness of the fungus. 
In order to prove that fungus attacks dead fish, I tied a clean fish 
without a spot on it to a stake in the river and left it there for a fort- 
