U S MAGNETIC DECLINATION 1910 AND EQUAL ANNUAL CHANGE BY S

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Download or edit the free picture U S MAGNETIC DECLINATION 1910 AND EQUAL ANNUAL CHANGE BY SAMUEL MARX BARTON 1912 for GIMP online editor. It is an image that is valid for other graphic or photo editors in OffiDocs such as Inkscape online and OpenOffice Draw online or LibreOffice online by OffiDocs.

This is a map of Magnetic Declination (also known as Magnetic Variation) in the United States Of America in the year 1910. I found it in the inner lining of the digitized version (//archive.org/details/elementsofplanes00bart) of the book "Elements Of Plane Surveying (Including Leveling)" by Samuel Marx Barton which was published in 1912 by D.C. Heath and Co. I put the two halves of the map together in one "jpg" format picture and processed the damaged lettering due to digitization to its near-original format. The small missing strip in the middle corresponds to the part of the map that have not been digitized due to binding constraints.

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