`   It is strongly suggested that an article be written to explain how the connections of the pendulum are made and cite famous examples such as the Pantheon apparatus, the Lexington apparatus, and/or others and also discuss or diagram the Charron chuck and how it is used in the pendulum apparatus.     It might be helpful to explain some of the previous statements in pertaining to a swinging pendulum vs. pertaining to a rotating pendulum bob (that rotates even when at rest).  Such as your previous comments pasted below; 1.  ``What remains is that the connection 'at the top' must be free to allow the wire to pivot with respect to the mounting. I assume that it is possible to devise a connection that has so little friction that the error it introduces is less than 1 part in 100. If the  connection at the top does not allow free pivoting I do not categorize the pendulum as a Foucault pendulum.``  How is pivot being used. 2.  ``A polar Foucault pendulum is the only pendulum where the resultant force acting on the bob (averaged over time) is free of torque``  Thank you for the interesting discussion.  I am not opposed to changes in the article, just am hoping that all the forces acting on the pendulum are addressed and how they are manifested in the apparatus.       == The South Pole Foucault experiment ==  There is the jocular South Pole Foucault pendulum experiment  Since this demonstration was not meant as a rigorous experiment, it does not carry very much weight, but it is indicative. The description does not mention any calibration procedure. The report states that they achieved consistent results. The amplitude of the South Pole Foucault pendulum decayed in a matter of hours, so they had to restart often, which they did manually.  The report of the South Pole Foucault pendulum experiment indicates confirmation that for a Foucault pendulum no calibration is needed.  |  `