Journal report by Kimberly Stacey Rosas
Anatomy and Physiology Lab I 2101.01
Introduction: What is the Brownian motion? The Brownian motion is the erratic random movement of microscopic particles in a fluid as a result of continuous bombardment from molecules of the surrounding medium. Robert Brown was a distinguished microscopist and botanist in the 1800s. Brown discovered the naked ovule of the gymnosperemae which is the most exacting piece of microscopical investigation which became known as the Brownian movement. As mentioned before, the Brownian movement is the erratic random movement of particles in the fluid on the microscope. At Robert Brown’s time of study in the 1800s the optical capacity of the microscopes was too limiting. It was believed that Robert Brown’s studies of observation were based on the movement of pollen grains. However, it has been proven in this generation that Brown’s optical paper shows the movement of minute particles, not only pollen grains. The early microscopes comprised a magnifying component that is typically a hand-polished biconvex lens made from soda glass. The ground-work of modern biology has been based on such instruments. Many discoveries have been achieved including the germinative cells of plants, animals and other realm of microorganisms.
Is it the Brownian movement, or Brownian motion? The high-powered microscopes weather they are simple or compound they are more likely to only observe the Brownian movement. What are only observed in the Brownian movement are the suspended particles in a fluid medium in unceasing movement back and forth. There is no sign of movement in a specific direction. Until 1827 Robert Brown wrote his precise and insightful experiment of observations.
Who was Robert Brown? Robert Brown was born at Montrose, Scotland, on December 21 of 1773. Brown was a descendant of a Scottish Episcopalian, his father James. Brown inherited his father’s intellectual strength.
References: Anon (1932) Centenary of Robert Brown 's Discovery of the Nucleus. 'The Linnean Society account describes the instrument as 'surprisingly simple, being little more than a dissecting-microscope. ' Journal of Botany, January. Bown, W. (1992) Brownian Motion sparks renewed debate, New Scientist, 133: 25, 15 February. Brown, R. (1827) A Brief Account of Microscopical Observations, etc., London (not published), vide p 8. Deutsch, D. H. (1991) Did Robert Brown observe Brownian Motion: probably not. Bulletin of the American Physical Society, 36 (4): 1374, April 1991. Reported in Scientific American, 265: 20. Ford, Brian J. (1973) The Revealing Lens: Mankind and the Microscope, London: Harrap, September.