 Under the editorship of Philip W. Goetz, the 1985 version of the 15th edition introduced other major changes.The 4,207 articles of the first version "Macropædia" were combined into 674 longer articles; for example, the individual articles for each of the 50 U.S. states were merged into what became a 310-page article "United States of America".The "Macropædia" was also restricted somewhat from 19 volumes to the present 17 volumes.