begins to rise, carrying the fish up to the 
top of the dam. Then the floor tilts and 
the fish swim out, safe above the dam. 
Another way of helping the salmon 
was to build ladders. The ladder is like 
a stairway, with each step about one 
foot high. The salmon can leap easily 
from one step to the next, and when they 
reach the last one the dangerous waters 
are behind them. 
The Government also stops fishing on 
rivers where salmon are becoming scarce. 
It makes rules about what kind of nets 
may be used. This is done so that 
enough fish will get by the nets to the 
spawning grounds to lay eggs. The 
Government tries in every way to make 
certain that America will never lose its 
salmon, as some parts of Europe have. 
48 
