The phrase “1915 North Tipperary by‑election” does not correspond to a widely documented or readily verifiable historical entry in major encyclopedic references. Consequently, reliable, detailed information about the event—such as the exact date, cause, participating candidates, electoral outcome, or its political significance—is not available from standard scholarly or reference sources.
If the term were used, it would plausibly refer to a parliamentary by‑election held in 1915 for the United Kingdom House of Commons constituency of North Tipperary (which existed from 1885 to 1922). By‑elections of this period were typically triggered by the death, resignation, or elevation to the peerage of the sitting Member of Parliament. In the broader historical context, the early 20th‑century Irish constituencies were represented by members of the Irish Parliamentary Party or, later, by Sinn Féin candidates, depending on the specific election.
Given the lack of corroborated encyclopedic records, any further detail would be speculative.