Jacob Amsler was a mathemetician (b.16 Nov 1823 d. 3 Jan 1912) born in Stalden bei Brugg , in the Vispa valley and died in Schaffhausen, Switzerland. On graduating from school, he went to the University of Jena and then to the University of Königsberg to study theology. At Königsberg he changed courses, deciding to focus on mathematics and physics after meeting the inspiring Franz Neumann . Amsler gained his doctorate from Königsberg in 1848.

He is credited with having invented the planimeter.

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