78 ROMANCE OF THE BEAVER 
occasion. What appears to happen is that the tail 
is used in starting, to give the first impetus by 
means of several quick side strokes, after which 
under ordinary conditions it does not seem to 
move. When a sudden burst of speed is required 
the tail again comes into play, but only with a few 
strokes so far as I could judge. 
2 
om 
