Jan Baptist van Helmont

Jan Baptist van Helmont (/ˈhɛlmɒnt/; Dutch: [ˈɦɛlmɔnt]; 12 January 1580 – 30 December 1644) was a chemist, physiologist, and physician from Brussels. He worked during the years just after Paracelsus and the rise of iatrochemistry, and is sometimes considered to be "the founder of pneumatic chemistry". Van Helmont is remembered today largely for his 5-year willow tree experiment, his introduction of the word "gas" (from the Greek word chaos) into the vocabulary of science, and his ideas on spontaneous generation.

Jan Baptist van Helmont
Portrait of van Helmont by Mary Beale
Born12 January 1580
Brussels, Spanish Netherlands (present-day Belgium)
Died30 December 1644(1644-12-30) (aged 64)
Vilvoorde, Spanish Netherlands (present-day Flemish Brabant, Belgium)
EducationUniversity of Leuven
Known forPneumatic chemistry
Scientific career
FieldsChemistry, physiology, medicine
Academic advisorsMartin Delrio

His name is also found rendered as Jan-Baptiste van Helmont, Johannes Baptista van Helmont, Johann Baptista von Helmont, Joan Baptista van Helmont, and other minor variants switching between von and van.

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