Cloth Spine Over Boards. Early printing, with same date on title and copyright page, Scribner’s seal but no “A”. Large quarto in original black cloth spine over green paper covered boards, boards printed in black. Darker green endpapers. Profusely illustrated with diagrams, line drawings and photographs. Covers show small ding to top of front board and general light age wear and soiling. A near very good copy of a scarce title in the original edition.