DescriptionDuhem Statique ch 2 fig 4.jpg	English: Illustrates Leonardo da Vinci's narration of the nature of the true term or spirited arm of a lever. With point m held as center, line mn, the true term is found by drawing a line from m to cut at a right angle the line (fh) of the power that moves the arm mh and calling the point of intersection n.
Date	1905
Source	Les Origines de Statique
Author	Pierre Duhem  (1861–1916)       Alternative names pseudonym: Ch. Clérice; Pierre Maurice Marie Duhem; Pierre Maurice Duhem Description French philosopher, physicist, university teacher, chemist, mathematician and philosopher of science Date of birth/death 10 June 1861  14 September 1916  Location of birth/death 2nd arrondissement of Paris  Cabrespine  Authority file : Q314172 VIAF: 73852904 ISNI: 0000000121393104 LCCN: n79128986 NLA: 35048295 Open Library: OL53034A WorldCat creator QS:P170,Q314172

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country. Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Duhem_Statique_ch_2_fig_4.jpg

Public domain in the United States because both published before 1923 and public domain in its home country in 1996, so not eligible for United States URAA restoration of copyright. The author died in 1916, so works by this author are also in the public domain in countries and areas where the copyright term is the author's life plus 80 years or less. Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works. Its home country was France, which followed the Berne Convention (70 years beyond the life of the author) beginning before 1996.