pl23_theb2461.jpg
![Signal pole with flag and tin cone for reflecting sunlight theb2461.jpg Signal pole with flag and tin cone for reflecting sunlight](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2461.jpg)
Description
Signal pole with flag and tin cone for reflecting sunlight.Epping Plains area of Maine
Credit
NOAA Central Library
Display Date
1857
Collection
Historic Coast & Geodetic Survey
Geodesy
Triangulation
Wooden Towers & Signal Poles
Keywords
Geodesy
Triangulation
Towers
Wooden