Bound typescript by Charles T. Leeds, 67 pp with table of contents, twelve exhibits and appendices A-J. Discusses tidal observations at the harbor, bench mark locations, and changes in sea level datum and methods of computation for determining mean sea level at Long Beach Outer Harbor.

Appendices:

A. Bibliography

B. Correspondence from USC&GS to A.L. Sonderegger re descriptions of bench marks, typescript (1911)

C. Report by Division of Tides and Currents to Director. USC&GS re errors in earlier tide summaries for San Pedro, positive photostat (1933)

D. "Sea Level Datum of 1929," Howard S. Rappleye, positive photostat of typescript "read before Section of Geodesy, American Geophysical Union, Apr. 27, 1938

E. "Variations in levels, 1919 to 1927, in Los Angeles harbor," G.F. Nicholson, positive photostat "reprinted from Bulletin of the Seismological Society of America, vol. 19, no. 4, December, 1929"

[F. absent]

G. Correspondence from USC&GS to Charles T. Leeds re USC&GS tidal observations at San Pedro, especially seiche study of 1936, positive photostat (1938)

H. Correspondence from USC&GS to Charles T. Leeds, re computation of mean sea level and datum planes relative to benchmarks, positive photostat (1938)

I. Correspondence from USC&GS to Charles T. Leeds, re water lines on charts, typescript (1936)

J. Correspondence from USC&GS to J.E. Rockhold (LA County Surveyor) re mean lower low water elevations in 1925 vs. 1853 and 1854 (1925)