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.

See also: Brownian Motion.

Previous PageView links to and from this pageNext Page

Subjects: Famous Scientists & Engineers Physics