Einstein's Theories of Relativity and GravitationNote 15 — XVII THE PHYSICAL SIDE OF RELATIVITYReading editionMonthly Notices. R. A. S., 1920, 80, 415. Journ. Brit. Astron. Assoc., 1919, 30, 46.◇Copy noteReturn to XVII THE PHYSICAL SIDE OF RELATIVITY