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Using the NIST Spectral Database, entering sodium (Na) with $\lambda$ between 588nm and 590nm gives wavelengths of 588.9950954nm and 589.5924237nm.


The title of the paper is: "Electromagnetic phenomena in a system moving with any velocity smaller than that of light" It can be found in full here: http://en.wikisource.org/wiki/Electromagnetic_phenomena. Scans of the original are available, at least for the moment, here (pdf) and here (png's). As wikisource notes the work is in the public domain in most ...


Miller, J.S.: The notched stick. Am. J. Phys. 23/3, 176 (1955). http://adsabs.harvard.edu/abs/1955AmJPh..23..176M Laird, E.R.: A notched stick. Am. J. Phys. 23/7, 472 (1955). http://adsabs.harvard.edu/abs/1955AmJPh..23..472L Scott, G.D.: Control of the rotor on the notched stick. Am. J. Phys. 24/6, 464 (1956). ...

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