Records, 1920-1992, of Henry J. Gielow, Incorporated, a naval architectural firm. Includes vessel descriptions and drawings of the yachts designed by Henry J. Gielow, Inc., business correspondence regarding military vessel and atomic power plant construction, correspondence regarding research on Henry J. Gielow, Incorporated, publications including articles, brochures and catalogs regarding vessels and yachting, journals, loose notes and lists of yachts and their owners.