Materials document Woodcock's correspondence and scientific research. Correspondence (1930-1995) includes correspondence from the scientists that Woodcock worked and collaborated with, as well as carbons of his own correspondence, plus journal articles and a small amount of personal correspondence. Most is related to topics Woodcock was investigating. Very little correspondence is from the years 1930-1950. Major collaborators were atmospheric scientist Duncan Blanchard; U.S. Navy scientist James Hughes; atmospheric chemist James Lodge; and atmospheric researcher Sean Twomey. Scientific research files date from 1937-1986 and consist of original data collected by Woodcock, as well as journal articles, record books and photographs. Major research projects covered include Woodcock's study of atmospheric sea salt, 1950-1965; Project Shower, a major study of warm rain in Hawaii, 1954-1957; fog studies, 1977-1981. In some files the topic can cover many years with significant gaps; sometimes multiple topics are covered within one file. Dates of research are those in which the primary research was conducted; other materials may be included that predate the primary research.