Köppen worked from the map prepared by the Swiss Origin botanist Alphonse-Louis-Pierre- Pyramus de Candolle (1806-93), the Professor of Natural History at the University of Geneva and possibly the most eminent botanist of his day Agent . [ Encyclopedia_of_Weather_and_Climate 0 NP MCLH 24/07/2017 ]

In 1828, the Scottish Origin botanist Robert Brown (1773- 1858) (1773- 1858) Agent had described the erratic movements of pollen grains in water, and in a paper published in 1905 Albert Einstein (1879-1955) showed that this Brownian motion could be explained if the pollen grains were being struck by moving molecules of water. [ Encyclopedia_of_Weather_and_Climate 0 NP MCLH 24/07/2017 ]

American Origin botanist F. Clements Agent , who studied succession, attempted to draw analogies between the structure and development of the organism and the community. [ PANACEA 937 0 NP MCLH 24/07/2017 ]