Wikisource: U.S. Naval Research Laboratory bibliography, 1959 (2026-10-07)

Found via Google results for the 1938 paper. Page: https://en.wikisource.org/wiki/The_clock_problem_(clock_paradox)_in_relativity (read with Chrome find and WebFetch).

Found [web]: Mildred Benton (Library Branch, Technical Information Division), "The Clock Problem (Clock Paradox) in Relativity: Theories, Both Pro and Con, Recorded in the Literature. An Annotated Bibliography", U.S. Naval Research Laboratory, Washington, May 1959. Entries: - 111. Ives, "Aberration of Clocks and the Clock Paradox", JOSA 27:305-309, Sept 1937: resolves the paradox through "motion relative to the ether". - 116. Ives and Stilwell, JOSA 28:215-226, July 1938: "Verifies the dependence of the passage of time upon motion." - 117. Ives and Stilwell II, JOSA 31:369-374, May 1941: "Direct experimental verification of retardation using atomic clocks." - 104 (per Chrome find): a note on Ives's work in connection with experimental verification of moving-clock retardation. - Builder 1957 (Aust. J. Phys. 10:246-262, 10:424-428) and Dingle 1957 (Nature 179:1242; 180:1275) on the clock paradox.

Bearing: a government record showing that by 1959 the US Navy's research library listed Ives's experiments as the experimental evidence on clock retardation, and his ether reading of the clock paradox alongside Dingle's and Builder's (historical record, priority 4). Confirms the 1941 citation (README had it from memory).