In Der Raum als Membran (Space as Membrane, 1926), Siegfried Ebeling described the outer membrane of a house as a breathable skin able to protect its inhabitants from harmful pollutants by allowing only healthful aspects of the environment through, such as fresh air and sunlight. Inspired by the research of Carl Dorno at his Physical–Meteorological Observatory in Davos, Ebeling was concerned by the effects of waves of radiation from space. To this end, Ebeling proposed a round, metal, energy self-sufficient house, which he exhibited in New York in 1930, one year after Buckminster Fuller unveiled his Dymaxion house. The formal similarities between the two houses may have lessened the impact of Ebeling’s design.