Seemingly suspended in midair in the Rockefeller Research Building lobby is a sculpture by the American-born artist William Reimann. Entitled Dispersal Four (1970), this swan-like art installation is constructed of Lucite, a transparent thermoplastic technically known as poly(methyl methacrylate) (PMMA). Holding true to Reimann’s artistic versatility and technical genius, “Dispersal Four,” with its inherent light-absorbing characteristics and adherence to the “natural laws of harmonics and proportion,” gives us the illusion of weightlessness. Reimann, who trained under prominent sculptors Joseph Albers and Rico Lebrun, is known for his use of Plexiglas and steel. In NYC, permanent collections by Reimann can be found in both the Whitney Museum and the Museum of Modern Art. Next time you enter the RRB lobby, don’t forget to look up – notice how the light hits “Dispersal Four” at different times of the day and appreciate the geometric configuration made from Lucite.