Jan Baptist van Helmont (/ˈhɛlmɒnt/;[2]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".[3] 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.
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.
^Walter Pagel, Joan Baptista Van Helmont: Reformer of Science and Medicine, Cambridge University Press, 2002, p. 10 n. 17.
^"Helmont". Random House Webster's Unabridged Dictionary.
^Holmyard, Eric John (1931). Makers of Chemistry. Oxford: Oxford University Press. p. 121.
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