THE BEAVER AS A SPECIES 221 



not to disturb the surroundings, or cause suspicions, 

 and everything should be done as quietly as pos- 

 sible. Be sure not to let moisture condense on the 

 lens of your camera. This causes more failures 

 than anyone will believe. During the autumn in 

 northern countries everything becomes covered with 

 a fine mist-like condensation. This is particularly 

 noticeable on glass, and you cannot get a sharp 

 image through it. Therefore wipe the lens 

 thoroughly or protect it carefully by means of a 

 hood which will open immediately before the 

 exposure. I dare not give information as to the 

 best kind of outfit to use, for I have not yet found 

 such a thing. Some new devices are being offered 

 now, but not having tried them 1 do not feel 

 justified in either giving their names or in recom- 

 mending them. So far I have had the best results 

 with electric apparatus, as they are quick, almost 

 silent and fairly convenient, but they don't always 

 work. If using any sort of electric device, be sure 

 to have an ample supply of batteries to take 

 the place of those that through mishap become 

 exhausted. I have had a tree dropped on my out- 

 fit, branches pulled between the legs of the tripod, 

 which was of course upset, and many other 

 accidents, which go to show that the pitfalls of 

 beaver photography are many and trying. A good 

 temper, plenty of patience, a reasonably good outfit 

 and a proper share of luck are the ingredients 

 necessary. All successful photographs will be well 



