A TRI ANGULATION STATION 



When doing triangulation work in a level or wooded country, it is sometimes necessary 

 to build a high tower that will bring the observers above the trees and buildings of the 

 neighborhood and afford them an unobstructed view of other towers or natural objects in 

 the distant landscape. On the coast of Washington a crow's-nest was built on a tree-top 

 and an elevation of 215 feet was secured. 



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