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Jan Baptist van Helmont
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Jan Baptist van Helmont 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 "th
Portrait of van Helmont by Mary Beale
Portrait of van Helmont by Mary Beale
Title page of Ortus medicinae
Title page of Ortus medicinae
Posthumous portrait of van Helmont
Posthumous portrait of van Helmont
The Romanesque tower of the old church in Neder-Over-Heembeek and house where van Helmont performed an alchemical transmutation. Drawing by Leon Van D
The Romanesque tower of the old church in Neder-Over-Heembeek and house where van Helmont performed an alchemical transmutation. Drawing by Leon Van Dievoet, 1963.
Spontaneous generation
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Spontaneous generation is a superseded scientific theory that held that living creatures could arise from non-living matter and that such processes were commonplace and regular. It was hypothesized th
Jan Baptist van Helmont
…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 was the youngest of five children of Maria (van) Stassaert and Christiaen van Helmont, a public prosecutor and Brussels council…
The goose barnacle
The goose barnacle
The barnacle goose
The barnacle goose
Claude Duret's 1605 Histoire admirable des plantes et herbes esmerueillables et miraculeuses en nature... illustrated numerous supposed examples of sp
Claude Duret's 1605 Histoire admirable des plantes et herbes esmerueillables et miraculeuses en nature... illustrated numerous supposed examples of spontaneous generation, such as this tree generating both fishes and birds
Louis Pasteur's 1859 experiment showed that a boiled nutrient broth did not give rise spontaneously to new life, but that if direct access to air was
Louis Pasteur's 1859 experiment showed that a boiled nutrient broth did not give rise spontaneously to new life, but that if direct access to air was permitted, the broth decomposed, implying that small organisms (in modern terms, microbial spores) had fallen in and started to grow in the broth.