Manual of Gurley Hydraulic Engineering Instruments
W. and L. E. Gurley, 1918. Hardcover. 139 plus index. The manual is divided into 2 sections: Gurley Current Meters - Their Construction, Care and Use; Gurley Automatic Water Stage Registers - Their Construction, Installation and Operation. Illustrated with black-and-white photographs, figures of instruments, and drawings. First edition (first printing).....