Leffel's Construction of Mill Dams and Bookwalter's Millwright & Mechanics.
Springfield, OH: James Leffel, 1881. First edition. Embossed Boards, blue. 12mo, pp. 280, indexed, illustrated with b/w engravings. Ex-library markings. A large octavo volume of the mill dams title was issued in 1874, but its large format made it expensive and impractical to use in the field. This revised edition..... More