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 ...

IN the July issue of Science Progress, Mr. N. H. de V. Heathcote brings together the data at present available for fixing the date of the discovery of the deviation of the compass from true north. The ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

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 ...