Special Collections of the National Agricultural Library (NAL) acquires, arranges, describes, preserves and makes available rare materials significant to the history of agriculture. Materials are obtained through donation or active collection in accordance with the established Special Collections collection development policy. Special Collections staff organize and describe materials according to archival principles and create descriptions and indexes to enhance access. Staff do not edit or otherwise modify the original materials. The views expressed in the collections do not necessarily reflect the policies of the National Agricultural Library or the United States Department of Agriculture.