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The 220 models in Cornell University's Reuleaux Collection were built in the late 19th century to demonstrate the elements of machine motion, as theorized by the German engineer Franz Reuleaux. The University acquired the models in 1882 for use in teaching and research. This is KMODDL's core collection and at present is the most extensively documented and enhanced with multimedia resources. Search Catalog Data Catalog Data & text in Documents Advanced Search Collections All Collections A. D. White Architectural Photographs Beyond the Taj Billie Jean Isbell Andean Collection Claire Holt Indonesian Art Collection Collection of Alison and Richard Jolly Cornell Lab of Ornithology Art Collection Cornell University Political Americana Colle Cornell Vicos Herbert F. Johnson Museum of Art Howell Icelandic Collection Images from the Map Collection NYS Aerial Photographs Rare and Manuscript Collections Images Reuleaux Kinematic Mechanisms Collection Willard Straight LUNA Commons Collections Alice Weston Great Houses Architecture and Urban Planning Collection C. Szwedzicki: The North American Indian Wor Catena-Historic Gardens and Landscapes Archi David Rumsey Historical Map Collection Deneia Archive Estate Collection Farber Gravestone Collection George Catlin: The Printed Works Hoover Institution Poster Collection Japanese Historical Maps JCB Archive of Early American Images Maps of Africa McKenney and Hall: History of the Indian Tri Museum and the Online Archive of California National Palace English Phil Foster Collection Pratt Institute Archives Negative Collection Pratt Institute Archives Photograph Collecti Pratt Institute Ex Libris Collection Pratt Institute Fashion Plate Collection Robert A. Deshon Courthouses Collection The Spanish Antiphoner Explore Browse All Media Groups Presentations External Media Search Browse Categories Workspace Create Media Groups Presentations Share This Help Browse Reuleaux Kinematic Mechanisms Collection Collection Selection