2026-10-08 Delpher (KB, Dutch historical newspapers)
Site: https://www.delpher.nl/nl/kranten
Query: "Lorentz" "Columbia" New-York, newspapers, period 01-01-1905 to 31-12-1906. Result: 2 articles [web] https://www.delpher.nl/nl/kranten/results?query=%22Lorentz%22+%22Columbia%22+New-York&coll=ddd
- Algemeen Handelsblad, 31-01-1906, "Kunst en Wetenschappen". The snippet reads: "Men meldt ons uit Leiden: Prof. dr. H. A. Lorentz, die aan de Columbia Un[iversiteit] ..." ("We are told from Leiden: Prof. Dr. H. A. Lorentz, who at Columbia University ...") [web, snippet].
- Zutphensche Courant, 23-04-1906, "School- en Kerknieuws". The snippet mentions a professor going to California "to give a course at the university at Berkeley", and "Prof. Lorentz vertrok naar Amerika om voor de studenten van de Columbia Universiteit, te ..." ("Prof. Lorentz left for America to [lecture] for the students of Columbia University ...") [web, snippet].
Bearing: these are historical records (priority 4) of the Columbia lecture trip, announced in January 1906 and reported in the Dutch press in April 1906. They are consistent with the title page [read: p.1-2] and the Spectator calendar. Neither article was opened in full (snippets only).
Next run: open both articles; search Lorentz elektronen Columbia, Lorentz Amerika 1906, Lorentz relativiteit 1913 Teyler, and Lorentz Michelson Miller 1925 1926.