Daniel Halladay
American businessman (1826-1916)

Daniel Halladay (November 24, 1826 in Marlboro, Vermont – March 1, 1916 in Santa Ana, California) was an American engineer, inventor and businessman, best known for his innovative self-regulating windmill, invented in Ellington, Connecticut in 1853.
Because steam trains required frequent resupplies of clean water, Halliday's windmill and subsequent self-regulating designs became an essential part of early railroad infrastructure, particularly in the Great Plains.
Versions of this windmill became an iconic part of the rural landscape in the United States, Argentina, Canada, New Zealand, and South Africa.
The historic Windmill at Ruprechtov based on Halladay's invention can be found in Ruprechtov in the Vyškov District of the Czech Republic.
Begin with the source’s own compact description: “Daniel Halladay” is american businessman (1826-1916). The dossier treats that line as a proposition to test through Daniel, Halladay and American, not as a finished interpretation.
Why this record matters
The phrase “american businessman (1826-1916)” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 19, 2026. The linked authority identifier is Q5217411. VIAF identifies the subject as 5845164191753218740006. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1826, 1916 and 1853.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Daniel Halladay”, its source revision and the description used here.
- Expand the search: follow Daniel Halladay primary sources, Daniel Halladay archive and Daniel research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Daniel Halladay”?
- What terminology or title could unlock a more precise catalogue search?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “Daniel Halladay” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.