IN this small treatise the Deviation of the Compass in iron ships is professedly dealt with as a matter of observation, and distinct generally from magnetic science and the mathematical investigations ...

Our planet’s northern magnetic pole is not only racing toward Siberia at about 34 miles per year, it has been to Antarctica several times in the last million years—and it’s due to flip again. This isn ...

THE Admiralty Manual of Compass Deviation with its auxiliary Eiemenatry Manual would, after some lapse of time, appear to have been turned to good account by teachers of navigation. The small volume ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. According to marks on this small ...