Sir George Herbert DARWIN, Tides, in Encyclopaedia Britannica, IX Edition, R. S. Peale & Co. Chicago 1890 Vol. XXIII 353-381
George GREEN and John T. LLOYD, Kelvin's Instruments and the Kelvin Museum, University of Glascow, 1970. SBN 85261 016 5
KELVIN (=Sir William Thomson, Baron Kelvin), The tidal gauge, tidal harmonic analyser, and tide predicter, in Kelvin, Mathematical and Physical Papers (Volume VI), Cambridge 1911, pp 272-305. [From the Minutes of the Proceedings of the Institution of Civil Engineers, March 11, 1882.]
Paul SCHUREMAN, Manual of Harmonic Analysis and Prediction of Tides, U.S. Department of Commerce, Coast and Geodetic Survey, Special Publication No. 98, U.S. Government Printing Office, Washington, 1958 (reprinted May 1988).