# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/joseph-louis-gay-lussac
# Generated: 2026-09-02T05:13:59.467Z

schema: https://schema.org/Person
url: "https://fame.am/person/joseph-louis-gay-lussac"
name: "Joseph Louis Gay-Lussac"
slug: "joseph-louis-gay-lussac"
description: "He put the 2:1 ratio into water — proved hydrogen and oxygen combine by volume in exact proportion — and later gave the world a clean scale for measuring how much kick is in the bottle."
tagline: "French chemist and physicist (1778–1850)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Gaylussac.jpg"
gender: "male"
country:
  name: "France"
  isoCode: "FR"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1778-12-06"
deathDate: "1850-05-09"
livingStatus: "DECEASED"
scores:
  popularity:           64.59
  momentum:             15
  historical:           23.65708133333334
  currentAttention:     17.71428571428572
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "STABLE"
ranks:
  global:   null
  country:  null
  category: 183
tags:
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    slug: "scientists"
  - name: "Scientist"
    slug: "scientist"
  - name: "Physics"
    slug: "physics"
  - name: "Chemistry"
    slug: "chemistry"
  - name: "Politics"
    slug: "politics"
  - name: "France"
    slug: "france"
  - name: "Europe"
    slug: "europe"
  - name: "19th Century"
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    title: "Louis Joseph Gay-Lussac"
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# bio (long form, separated for readability)
bio: |
  Joseph Louis Gay-Lussac was born on 6 December 1778 in France and trained as both a chemist and physicist at a time when the two were barely separate. Working alongside Alexander von Humboldt, he demonstrated that water forms from two parts hydrogen to one part oxygen by volume — a clarifying jolt for early atomic theory. He went on to establish two laws governing gas behavior, tightening the field's empirical backbone. His later investigations into alcohol–water mixtures yielded the degrees Gay-Lussac, a measurement standard that many countries still use to classify spirits. He died on 9 May 1850, having spent a career turning vague substance into number.