Throughout his life Lewis Fry Richardson made many inspired contributions to various disciplines. Often his ideas were ahead of contemporary thinking, and preceded the technical means necessary for their practical implementation. He is best known for his wealth of important work on meteorology, and his groundbreaking application of mathematics to the causes of war, though his field of interest was in no way limited to these topics, and various aspects of psychology and mathematical approximation also benefited from his novel modes of thought. Collected in the first volume are all Richardson’s important papers covering the mathematical and physical sciences.