Search Only Images Visit Image Gallery FAQ page Visit Image Gallery FAQ imggal_sm2.png Allegheny Observatory in Experiments in Aerodynamics Download this image Image ID: SIL-SIL28-060-02 Cite this: Langley, S. P. (Samuel Pierpont). 1902. Experiments in aerodynamics., Washington : Smithsonian Institution. Original Caption: Allegheny Observatory. Plan of Grounds. Scale : 1 inch = 20 feet Tag(s): technical drawing, whirling table Topic(s): Aeronautics Find in: Library Catalog Download: Image No Copyright - United States Request copy of image How can I use this image?