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JOURNAL OF FORESTRY 



peak will be abnormally large in scale compared with a valley appear- 

 ing in the same photograph, since it will be nearer the camera in eleva- 



tion at the instant of exposure. The summit will be large scale, the 

 valley small scale, and the slopes on various intervening scales. 



In spite of this undesirable feature, this type of map answers mili- 

 tary requirements admirably, especially when accurate scale maps of 



