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Galileo sells a geometric-military compass as a dated instrument business

In the 1590s Galileo sold a geometric-military compass with a manual. It is an instrument business, not Sidereus Nuncius. In the causal graph this event weakens the driver Labour-Market Tightness.

Read the full account

In the 1590s Galileo sold a geometric-military compass with a manual. It is an instrument business, not Sidereus Nuncius. Galileo Galilei's documented role is: He designed and sold compasses with a manual. Artisans made them; he did not uniquely invent all proportional compasses.

Context

Private pupils bought. Sharing manufacture with unnamed makers is required. Contribution type is direct. Driver labour-market-tightness is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

If a number is not in the two records named above, it is not supplied here.

Why it matters

The welfare reading on this path is improving.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Galileo Galilei

    Person

    Direct responsibility

    responsibility level 0.36 · verified

    He designed and sold compasses with a manual. Artisans made them; he did not uniquely invent all proportional compasses.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

    1. FactGalileo sells a geometric-military compass as a dated instrument business
    2. weakensDriverLabour-Market Tightness

    impact weight 0.3 · Effect from 1 January 1597 · verified

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Museo Galileo — geometric compass heritageMuseo Galileo / IMSS · High credibility · verified
  2. 2.Britannica — Galileo, Pisa chairEncyclopaedia Britannica · High credibility · verified
What the sources establish

Official locator: Museo Galileo — geometric compass heritage at https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html (opens in a new tab) (Museo Galileo / IMSS). Independent locator: Britannica — Galileo, military compass at https://www.britannica.com/biography/Galileo-Galilei (opens in a new tab) (Encyclopaedia Britannica). Official carrier: Museo Galileo — geometric compass heritage (https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html (opens in a new tab); Museo Galileo / IMSS). Independent carrier: Britannica — Galileo, military compass (https://www.britannica.com/biography/Galileo-Galilei (opens in a new tab); Encyclopaedia Britannica).

The contribution type is direct. That reading is an impact-path choice, not a property stored on the Fact itself.

Confidence is stated on the impact path, not hidden in adjectives. A later museum is a carrier, not 1597.

Naming Galileo Galilei does not delete co-authors, institutions, or later transmitters. The lag from 1597-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorGalileo Galilei
  2. contributed toFactGalileo sells a geometric-military compass as a dated instrument business
  3. weakensDriverLabour-Market Tightness

Cite this page

Factrail. (2026). Gal Compass. Factrail. https://factrail.ai/facts/gal-compass

https://factrail.ai/facts/gal-compass

Accessed 16 October 2026.

By the · Method: how we source and score · Last reviewed

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