From 1932 he worked on the problem of the "expanding universe" and in Relativity, Gravitation, and World-Structure (1935), proposed an alternative to Albert Einstein's general relativity theory.
Od roku 1932 pracoval na problému "rozpínajícího se vesmíru" a v publikaci Relativity, Gravitation and World-Structure (1935), navrhla alternativu k Einsteinově obecné relativitě.