Paul Jaccard
Swiss botanist (1868-1944) · Switzerland · On the map · Scientists · Died at 75
Paul Jaccard was a professor of botany and plant physiology at the ETH Zurich. He studied at the University of Lausanne and ETH Zurich. He continued studies in Paris with Gaston Bonnier. He developed the Jaccard index of similarity and published it in 1901.
Paul Jaccard is read about 8.5 times a day, in 7 languages.
A typical day, 30 days to 23 September 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
Something wrong?Also in Deutsch
Media & music
Photos 1
About this person
He also introduced the use of the species-to-genus ratio in biogeography. In the 1920s, Paul Jaccard engaged in a dispute with the Finnish botanist and phytogeographer Alvar Palmgren over the interpretation of species-to-genus ratio, as evidence of competitive exclusion or attributable to random sampling.
