Digital Library Search
![Chart showing isogonic lines for year 1900 theb1311.jpg Chart showing isogonic lines for year 1900](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb1311.jpg?itok=-u3k_juL)
Image
Download ( 1.4 MB )Permalink
https://www.noaa.gov/media/digital-library-photo/pl23theb1311jpg-0Description
Chart showing isogonic lines for year 1900.Isogonic lines are lines of equal declination
Collection
Historic Coast & Geodetic Survey
Keywords
Geophysics
Geomagnetism