Sources

  1. Title page: the animation of the trajectory of a double pendulum was created by "100Miezekatzen" and put onto Wikicommons under a GNU Free Documentation License.

  2. The picture of Pythagoras is from the book Theorica Musicae by Franchino Gaffurio, published around 1480. It is now in the public domain on Wikicommons.

    The animation of standing waves on a string was created by "Adjwilley" and placed on Wikicommons under a Creative Commons Attribution-Share Alike 3.0 Unported license.

  3. The image of vibrating strings was created by "Baba66" and put onto Wikicommons under a a GNU Free Documentation License.

  4. Kepler's Harmonice Mundi Libri V is from the Internet Archive, a free open-access collection.

  5. The animation of a pendulum was created by "burro" and put on Wikicommons under a GNU Free Documentation License.

    The animation of a standing wave was created by "LucasVB" and put into the public domain on Wikicommons.

    The animation of vibrational modes of air in an open tube was created by Christophe Dang Ngoc Chan and put on Wikicommons under a GNU Free Documentation License.

    The animation of a mass on a spring was created by Oleg Alexandrov and put into the public domain on Wikicommons.

  6. The image of Huygen's pendulum clock is from page 179 of Ernst Gerland and Friedrich Traumüller's 1899 book Geschichte der Physikalischen Experimentierkunst, and it is available on Wikicommons.

  7. The animation of simple harmonic motion in real space and phase space was created by "Mazemaster" and put into the public domain on Wikicommons.

  8. The animation of a point moving on a circle, together with the sine and cosine functions, was created by "LucasVB" and put into the public domain on Wikicommons.

  9. The animations of a pendulum swinging 30°, 60° and 170° were created by Lucas V. Barbosa and put into the public domain on Wikicommons.

  10. The source of the image of Lissajous' experiment is unknown. Which old book?

  11. The 2:1 and 3:2 Lissajous curves were created by Alessio Damato and put on Wikicommons under a GNU Free Documentation License.

  12. The picture of Tisley's harmonograph appears on page 5 of Harmonic Vibrations and Vibration Figures by Joseph Goold, Charles E. Benham, Richard Kerr and L. R. Wilberforce, published by Newton and Co. in 1909.

    The 3:2 harmonograph image appears on Plate III of Harmonic Vibrations and Vibration Figures.

  13. Text by John Baez.

  14. The animation of the trajectory of a double pendulum was created by "100Miezekatzen" and put onto Wikicommons under a GNU Free Documentation License.

    The animation of a double compound pendulum was created by "Catslash" and put into the public domain on Wikicommons.

  15. The animation of 32 points bouncing in a square box was created by A. Greg and put onto Wikicommons under a GNU Free Documentation License.

  16. David L. Nolte's paper The tangled tale of phase space was published in Physics Today, April 2010, pp. 33–38.

  17. The harmonograph image was created by Anita Chowdry.