pl23_cgs00091.jpg
Description
Lines of equal magnetic declination and equal annual change for 1935.
Display Date
1935 Ca.
Category
Historic Coast & Geodetic Survey
Keywords
Geophysics Magnetics
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.