New York: Combustion Engineering Company, Inc., 1942. Paperback. 32p., glazed paperstock with b&w diagrams and photoillustration nearly every page, softbound in 7.5x5.2 inch plain printed wraps. A much-resorted-to copy with a light vertical crease to entire fascicle, light soil to covers, rusty oilstains to several leaves within, also light crimping; staples have a touch of rust. The company is based in New York but a back-cover list of District Offices includes San Francisco, Los Angeles, Portland Oregon, and Seattle. The Foreword specifically mentions Liberty Ship "emergency construction" which necessitated a proven or "frozen" design.