A Table of the Mean Declination of the Magnet in Each Decade from January 1858 to December 1863, Derived from the Observations Made at the Magnetic Observatory at Lisbon; Showing the Annual Variation, or Semiannual Inequality to Which That Element Is Subject

✍ Scribed by Senhor Da Silveira

• Book ID: 124345666
• Publisher: The Royal Society
• Year: 1863-1864
• Weight: 317 KB
• Volume: 13
• Category: Article
• ISSN: 0365-0855
• DOI: 10.2307/112061