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. 



