These motions were such as to satisfy me, after frequently repeated observation, that they arose neither from currents in the fluid, nor from its gradual evaporation, but belonged to the particle itself.
Summary of Brownian motion
'A Brief Account of Microscopical Observations made in the Middle of June, July, and August, 1827, on the Particles Contained in the Pollen of Plants', Philosophical Magazine, 1828, NS 4, 162–3
