Susanna Phelps Gage Susanna Phelps Gage Susanna Phelps Gage (1857–1915) was an American embryologist and comparative anatomist. She initially worked on the anatomy of small animals and humans, later shifting into neurology to study the embryological development of the brain and the anatomy of the human nervous system. She also developed a new and widely adopted method for making anatomical teaching models out of paper rather than wax. Although Susanna Phelps Gage was a respected embryologist and camparative anatomist, her work was often ignored. Like most other women scientists of the late 19th and early 20th centuries who were married to scientists, Gage's
Manzolini Libellula Libellula III) was built and a four-seat Libellula IV was planned but Manzolini stopped development in the late 1960s. Manzolini Libellula The Manzolini Libellula was a 1950s Italian co-axial twin-rotor helicopter designed by Ettore Manzolini. "Libellula" is the Italian word for "Dragonfly". Ettore Manzolini established a company in Rome, Italy to develop a helicopter he had designed. The design was the Manzolini Libellula an unusual co-axial helicopter. The co-axial arrangement eliminating the need for an anti-torque rotor allowed the helicopter to have a twin fin arrangement. The Libellula (Registered I-MANZ) first flew on 7 January 1952. An improved version was