Truman State University Special Collections (ArchivesSpace), 2026-10-06 (Investigator, Step I, run 1)

Site: https://manuscripts.truman.edu (reached in Chrome). Found through Google "The New Mechanics" Poincare Monist Halsted 1910, then confirmed with site:manuscripts.truman.edu Poincaré "New Mechanics" Halsted.

Found (priority 4, historical record)

URL: https://manuscripts.truman.edu/repositories/2/archival_objects/16255 - Item: 'Henri Poincaré. "The New Mechanics" translated by George Bruce Halsted, reprint from The Monist, approximately 1902.' - Location: James Mickelborough Greenwood Papers (MS G1), series "Correspondence, Personal and Professional, from Dr George Bruce Halsted, Vice President of American Association for the Advancement of Science, 1902-1903, with Enclosed Publications, 1897-1903". Pickler Memorial Library; contact speccoll@truman.edu [web].

Bearing

• This is a physical offprint of a Halsted translation titled "The New Mechanics", filed among enclosures dated 1897-1903. The catalogue date "approximately 1902" conflicts with The Monist 1913 printing of the Göttingen lecture (en-wikisource notes; JSTOR snippet in google notes). The explanations below cannot yet be told apart: (a) the cataloguer estimated the date from the folder, and the offprint is the 1913 item filed later; (b) it is a different Poincaré text translated by Halsted under the same title (Halsted published many Poincaré translations in The Monist from 1898 on [memory, medium]); (c) a mistaken title.
• The record that would decide it: the offprint's printed volume and page line (385-395 would mean the 1913 text), from a scan or a request to Special Collections. It does not affect the content of the claims. It matters only for dating and for the translator's history.