WS 64. Accuracy of stream measurements, by E. C. Murphy. 1902. 99 pp., 4 pls.

WS 76. Observations on the flow of rivers in the vicinity of New York City, by H. A. Pressey. 1902. 108 pp., 13 pls.

WS 80. The relation of rainfall to run-off, by G. W. Rafter. 1903. 104 pp.

WS 81. California hydrography, by J. B. Lippincott. 1903. 488 pp., 1 pl.

WS 88. The Passaic flood of 1902, by G. B. Hollister and M. O. Leighton. 1903. 56 pp., 15 pls.

WS 91. Natural features and economic development of the Sandusky, Maumee, Muskingum, and Miami drainage areas in Ohio, by B. H. Flynn and M. S. Flynn. 1904.—pp.

WS 92. The Passaic flood of 1903, by M. O. Leighton. 1904.—pp., 7 pls.

Series N—Water Power.

WS 24. Water resources of State of New York, Pt. I, by G. W. Rafter. 1899. 92 pp., 13 pls.

WS 25. Water resources of State of New York, Pt. II, by G. W. Rafter. 1899. 100-200 pp., 12 pls.