Washington: Smithsonian, 1896.
43pp. Thin small folio, printed wrappers; unopened, edgeworn. Washington: Smithsonian Institution, 1896. First American Edition.
Smithsonian Contributions to Knowledge, 1033. The joint paper had been read at Oxford in January, 1895 and was published the same year in London. Lord Rayleigh received the Nobel Prize in Physics for this discovery, the most important consequence of which was the further discovery of helium.