An article based on the Thirtieth Joseph Henry Lecture of The Philosophical Society of Washington delivered on May 12, 1961. This address is included in Volume 16 of the archival Bulletin of the Society.
Three hundred and fifty years ago, long before Newton was born, at a time when the motions of freely falling bodies were first being carefully observed and analyzed, William Gilbert, the physician of Queen Elizabeth I, was collecting facts about magnets. These he published in his famous book De Magnete. Magnets were, at the time, thought of as curios having occult and magical properties. These Gilbert reviewed, but in addition he performed a most extraordinary feat of synthesis. He collected data on the orientation of compass needles carried around the surface of the earth earth by mariners and showed that the enormously varied observations could all be described by means of one basic assumption, that the earth itself was a magnet.
This article is only available in PDF format
References
1. W. Sturgeon, Trans. Soc. Arts 43, 38 (1825).
2. M. Faraday, Experimental Researches in Electricity, Vol. 3, p. 29.
7. S. Foner and H. H. Kolm, Rev. Sci. Instr. 28, 799 (1957); https://doi.org/RSINAK H. Furth, R. Waniek, M. Levine, Rev. Sci. Instr. 27, 195 (1956) https://doi.org/RSINAK, Rev. Sci. Instrum. and H. Furth, R. Waniek, M. Levine, 28, 949 (1957).https://doi.org/RSINAK, Rev. Sci. Instrum.
At the end of the turbulent 1960s, the postwar funding boom in US physics came to a crashing halt. The lessons learned then may be helpful to today’s physicists.
Interviews with 22 successful early-career physical scientists and engineers reveal that networking has been one of the most critical ways to nurture their careers.
An interview with a prominent member of the Marshallese diaspora delves into the ongoing impact of aboveground US nuclear weapons testing in the Pacific archipelago.
September 10, 2026 12:45 PM
This Content Appeared In
Volume 14, Number 9
Get PT newsletters in your inbox
PT The Week in Physics
A collection of PT's content from the previous week delivered every Monday.
One email per week
PT New Issue Alert
Be notified about the new issue with links to highlights and the full TOC.
One email per month
PT Webinars & White Papers
The latest webinars, white papers and other informational resources.