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BROWNIAN MOTION-PAST AND PRESENT

We discuss Brownian motion from the more elementary viewpoint presented by Einstein in 1908. Later developments and applications are briefly reviewed. One of the celebrated papers of 1905 deals with a quantitative study of the random motion.A couple of years later Einstein wrote a simplified account of the seminal work and we will present this version in this article. A direct test of the molecular kinetic theory was his obsession during his student days.The analysis of motion of suspended particles in a liquid was an attempt to make observable predictions that when tested would establish,beyond doubt, the correctness of the molecular point of view. The analysis begins by considering a non-uniform solution in a container