Carrie Everson
American metallurgist
Carrie Jane Everson (born Rebecca Jane Billings; 27 August 1842–3 November 1914) was an American inventor who patented processes for extracting valuable minerals from ore using froth flotation. The Mining Journal noted in 1916 that "as a metallurgist she was a quarter of a century in advance of her profession".
Early life
Rebecca Jane Billings was born on 27 August 1842 in Massachusetts and grew up in Illinois, receiving a good education. She was known as Carrie Jane Everson after her marriage.
Career
Everson discovered that if fats or oils are combined with an ore, the oils adhere to the metals and not the rock. On her lab bench she tested this technique with gold, copper, antimony, and arsenic ores. She was awarded two United States patents for her discoveries, US471174A and US474829A. By 1890, she had tested her process, with the help of others, at Georgetown and Silver Cliff, Colorado and at Baker, Oregon. During this period, her husband died and she returned to nursing school, a career she followed in Denver. In 1901, a lawyer misadvised her to not renew her patents just as the flotation process was being re-discovered in England.
After her patents had expired others used her methods which she lived to appreciate if not to benefit from.
Begin with the source’s own compact description: “Carrie Everson” is american metallurgist. The dossier treats that line as a proposition to test through Carrie, Everson and American, not as a finished interpretation.
Why this record matters
The phrase “american metallurgist” 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.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Apr 15, 2026. The linked authority identifier is Q24577722. VIAF identifies the subject as 36621605. The Library of Congress control number is no2004015232. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1842, 1914, 1916 and 1890.
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 “Carrie Everson”, its source revision and the description used here.
- Expand the search: follow Carrie Everson primary sources, Carrie Everson archive and Carrie 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 “Carrie Everson”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Carrie Everson” 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.