In this rapid stream (Newfoundland) the beaver selected the only possible 

 place for their dam. By making use of the large boulder they secured 

 anchorage for the structure. 



lie log (cut by lumber-men) seen in the foreground evidently suggested to 

 the beaver the site for their dam, aud is an illustration of how they 

 take advantage of conditions. The dam was 365 feet in length. 



