A Brief Account of Microscopical Observations Made

This is an invaluable work by the famous Scottish botanist Robert Brown focusing on his observations of the "rapid oscillatory motion" of various microscopic particles. Brown described the irregular movement of minute particles suspended in a liquid. He presented the results of a series of experiments from his study on the action of pollen and compared this with the work of previous authors. The phenomenon he observed in organic and inorganic substances is called Brownian motion.