RankingsPrimerArbiterPhysicistMathematicianContrarianQESites logClaimsSourcesResearch notes

gilles.montambaux.com, "histoire-physique/Rayleigh-Jeans" collection, 2026-10-08

Investigator run 1, Jeans-JH. Found by the Chrome Google query Jeans 1905 "partition of energy between matter and æther" OR "partition of energy between matter and aether" Philosophical Magazine. The folder https://gilles.montambaux.com/files/histoire-physique/Rayleigh-Jeans/ has an open directory listing. It is a physicist-historian's (Gilles Montambaux) collection of the 1900-1916 Rayleigh-Jeans sources. All files were downloaded to research/files/montambaux/ (and the 1905 Phil. Mag. paper to research/files/jeans-1905-partition-energy-matter-aether-PhilMag.pdf). Priority 1 (the inventor's own work) and 2.

Files obtained

  • 02 Jeans 1904 book (not re-downloaded: the project already holds it); 14 Jeans 1916 book (not downloaded; the IA copy was used).
  • 03 Rayleigh, Nature 71, 559 (13 Apr 1905); 04 Jeans, Nature 71, 607 (27 Apr 1905); 05 Rayleigh, Nature 72, 54 (18 May 1905); 06 Jeans, Nature 72, 101 (1 Jun 1905); 09 Rayleigh, Nature 72, 243 (13 Jul 1905); 10 Jeans 1905-07-27 "comparaison"; 11 Jeans 1905-10-11. These are image scans; only 04 and 12 were rendered and read this run.
  • 07 Jeans, "On the partition of energy between matter and Aether", Phil. Mag. [6] 10, 91-98 (1905) (text layer present; not read this run).
  • 08 Jeans, Proc. Roy. Soc. (1905) p.296 (scan).
  • 12 Oliver Lodge, "Supplementary Note on Radiation", Nature 118, p.81 (17 Jul 1926).
  • 13 Solvay Council 1911, comptes rendus (Jeans's report; French text layer).
  • Jeans-1900, Jeans-1901-1/2/3, Jeans-1902, Jeans-1903-1/2: Jeans's early papers. The Benettin et al. reference "[J1] Jeans, Phil. Mag. 6, 279 (1903)" is probably among them (not identified this run).
  • jeans-comment-Hudson.pdf: R. Hudson, "James Jeans and radiation theory", Stud. Hist. Phil. Sci. 20 (1989) (secondary).

Findings read this run

Jeans, "The Dynamical Theory of Gases", Nature 71, p.607 (27 April 1905) [read: page image, files/montambaux/04-...pdf]

His reply to Rayleigh's criticism (Nature, 13 April 1905). Rayleigh had written that appealing to the ether only brings in "an infinitude of new modes of vibration". Jeans answers with a closed vessel of air at 15 C with perfectly reflecting walls. Call A the energy of the five translational and rotational degrees of freedom, and B the energy of the remaining degrees of freedom of matter plus the ether. Equipartition gives "in the final state of the gas" A:B = 5:infinity, "whereas observation seems to suggest that the ratio ought to retain its initial value A:B = 5:0". His point "is that the transition from the ratio (2) to the ratio (1) is very slow—if my calculations are accurate, millions of years would hardly suffice for any perceptible change—so that, although (1) may be the true final ratio, it is quite impossible to obtain experimental evidence of it." At much higher temperature the transition "would undoubtedly be much more rapid". He cites Boltzmann's suggestion (Coll. Works ii p.433) that the explanation lies in "the mutual action between the molecules and the aethereal medium". He also states the experiment's limits: an enclosure impervious to all forms of energy "cannot be realised in practice". - Bearing on claims 1-2: this is the clearest short statement by Jeans himself that his 1904 theory is a claim about time scales (very slow approach to equipartition), not about the final equilibrium. Benettin, Galgani and others later named it the Boltzmann-Jeans conjecture (see the unimi note).

Oliver Lodge, Nature 118, p.81 (17 July 1926) [read: page image, files/montambaux/12-...pdf]

Lodge corrects his own earlier letter (p.891, 26 June 1926). The 8 pi R factor in the radiation law "is, however, due not to Rayleigh but to Dr. Jeans (see Phil. Mag. for July 1905)": Rayleigh's 1905 Nature letter gave 64 pi R, and "Jeans speedily pointed out a source of error". Lodge adds that neither gas theory, probability nor dynamics "was competent to express fully the interaction between matter and ether", and that the quantum moved the puzzle to "explanation of the quantum itself". - Bearing: the historical record of the Rayleigh-Jeans law, and a 1926 voice (Lodge, an ether advocate) keeping the matter-ether framing.

Hudson 1989 (secondary; opening read)

Abstract, in paraphrase: it traces Jeans's "initial staunch opposition" to Planck's law and says that "During 1910, Jeans repositioned himself on the side of quantum theory", for empirical and theoretical reasons. It disputes how Poincare (1913) and Kuhn (1978) read Jeans. [web: files/montambaux/jeans-comment-Hudson.pdf p.1] - Bearing: dates Jeans's conversion to 1910, earlier than the "1913-14" [memory, medium] in claims.md and the deep reads. The lecture itself says "Poincare (1912) and myself (1910) shewed that Planck's analysis could be reversed" [read: Atomicity p.9], which agrees with Hudson. See the Corrections section in sites.md.

  • 07 (Phil. Mag. 1905), 08 (Proc. Roy. Soc. 1905), the 1903 papers (Jeans's collision-excitation model), 13 (Solvay 1911), and the rest of Hudson 1989.