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sites.google.com/site/experimentsinphotosynthesis8b/jan...

Jan Van Helmont was born on December 30th 1664. He is the youngest of five children. Jan Van Helmont wanted to prove plants use materials from the soil to perform photosynthesis.

www.britannica.com/biography/Jan-Baptista-van-Helmont

Jan Baptista van Helmont: Jan Baptista van Helmont, Flemish physician, philosopher, mystic, and chemist who recognized the existence of discrete gases and identified carbon dioxide. Van Helmont was born into a wealthy family of the landed gentry. He studied at Leuven (Louvain), where he finished the course in philosophy and

en.wikipedia.org/wiki/Jan_Baptist_van_Helmont

Jan Baptist van Helmont (/ ˈ h ɛ l m ɒ n t /; Dutch: [ˈɦɛlmɔnt]; 12 January 1580 – 30 December 1644) was a Flemish chemist, physiologist, and physician. He worked during the years just after Paracelsus and the rise of iatrochemistry, and is sometimes considered to be "the founder of pneumatic chemistry".

www.answers.com/Q/How_did_Jan_van_Helmont_discover_photosynthesis

Von Helmont did not discover photosynthesis, but his famous experiment with the willow tree planted in a measured fixed amount of soil over several years gave a very good hint for others to conclude.

www.bbc.com/bitesize/clips/zpgb4wx

In 1634, Jan Baptist van Helmont was arrested by agents of the Spanish Inquisition for the crime of studying plants and other phenomena. While under house arrest, he started to consider how plants ...

photosynthesiseducation.com/discovery-of-photosynthesis

Photosynthesis was partially discovered in the 1600’s by Jan Baptista van Helmont, a Belgian chemist, physiologist and physician. Helmont performed a 5-year experiment involving a willow tree which he planted in a pot with soil and placed in a controlled environment.

www.bbc.com/bitesize/guides/zq8s2nb/revision/4

Historical experiments to investigate photosynthesis Jan Baptista van Helmont. Jan Baptista van Helmont (1580-1644) partially discovered the process of photosynthesis. He grew a willow tree in a ...

en.wikipedia.org/wiki/Photosynthesis

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities. ... Jan van Helmont began the research of the process in the mid-17th century when he carefully measured the mass of the soil used by a plant and the mass of the ...

www.famousscientists.org/jan-baptist-von-helmont

Jan Baptist von Helmont died on 30 December 1644, aged 64. His son, Francis Mercury van Helmont (1614-1699), become a famous physician himself and a pivotal figure in the dissemination of his father’s ideas.

www.juliantrubin.com/bigten/photosynthesisexperiments.html

Jan Baptista van Helmont, Flemish physician, chemist, and physicist, in the 1600s carried out a famous experiment by growing a willow tree in a pot for five years. At the end of this period the tree had increased in mass by 74kg but the mass of the soil had changed little.