Field Collector's Manual in Natural History, by Unknown, 1944, Smithsonian Archives - History Div, Title page to "A Field Collector's Manual in Natural History" (Washington, D.C.: Smithsonian Institution, 1944), was prepared by members of the staff of the Smithsonian Institution. The manual, with directions on collecting natural history specimens, was sent to soldiers stationed abroad during World War II who wished to collect specimens for the United States National Museum..