 Adler's intention was that the "Macropædia" serve students who wish to learn a field in depth; for comparison, the short articles of the "Micropædia" are intended for quick fact-checking.The "Macropædia" was introduced in the 15th edition (1974) with 19 volumes having 4,207 articles.In the drastic reorganization of that edition in 1985, these articles were combined and condensed into 17 volumes with roughly 700 articles, ranging in length from 2-310 pages.