Langley, S. P. (Samuel Pierpont), 1834-1906 · Washington, Smithsonian institution · leaf 36
PLATE 11. … Wind velocities recorded January 14. 1893, at the Smithsonian Institution with a light Robinson anemometer (paper cups) registering every revolution. Abscissae = Time. Ordinates = Wind velocities in miles per hour.
Winds · Aeronautics
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
