Brown, Robert (1773-1858)
- Scotsman who discovered the brownian movement of minute particles (1828), a phenomenon that provides a basis for demonstrating molecular motion.
- 1825 He classified gymnosperms and separated them from true, flower-bearing angiosperms. He discovered the minute areola (spaces) in pollen grains, which he regarded as points for the production of pollen tubes.
- 1827 He observed that pine trees and their kin have ovules (undeveloped seeds) and mature seeds that are naked (not protected by an ovary).
- 1828 Discovered the brownian movement of minute particles.
- 1831 Discovered the general occurrence of the nucleus in plant cells.
- 1825 He classified gymnosperms and separated them from true, flower-bearing angiosperms. He discovered the minute areola (spaces) in pollen grains, which he regarded as points for the production of pollen tubes.
See also: Brownian Motion.
Subjects: Famous Scientists & Engineers Physics