2026-10-04 Bing search (via Chrome; used because Google gave a CAPTCHA)

Queries: 1. "Langmuir's paradox" electron scattering plasma oscillations 2. plasmatheory.engin.umich.edu Langmuir's Paradox Baalrud pdf 3. Godyak "Langmuir paradox revisited" 4. Langmuir 1928 "Oscillations in ionized gases" PNAS 14 627 5. Tonks "The Birth of Plasma" American Journal of Physics 1967 6. Irving Langmuir papers Library of Congress finding aid Tonks

Hits followed up (each has its own note): Baalrud et al. PRL 2009 (APS and the UMich open PDF), Godyak and Alexandrovich 2015 (IOPscience), Langmuir PNAS 1928, Tonks AJP 1967, Library of Congress Langmuir papers. Hits listed but not opened (leads for next run): - JSTOR PDF "Electron energy distributions in the low-pressure ..." (title truncated in the result list) [web] https://www.jstor.org (result in query 1) - modern-physics.org/langmuir-paradox (secondary, popular explainer) [web] - plasmasensors.com/publications "Langmuir paradox revisited" PDF (Godyak's company site, probably the author copy of the 2015 paper) [web] - fr.wikipedia "État plasma" cites Tonks 1967 [web] - Springer PDF "A Brief History and Chronology of Plasma" [web] - YouTube "The Birth of 'Plasma'" (Greg Fridman, 2020; secondary) [web] - irvinglangmuir.com/other-resources.html; archives.union.edu (Union College archives); catalog.hathitrust.org record [web] (from query 6) - AIP history catalog: "Irving Langmuir papers, circa 1871-1957", which also lists speeches and articles in manuscript [web] https://history.aip.org (catalog/icos)