principle he developed an analog computer to calculate tidal flow (electric analogon). In the period 1944-1956 it had become operational. Later on this machine was updated and became the practical computer to calculate tidal flow and water levels in the Dutch Delta to predict the effect of closure works, the Delta Works. This analog computer now bears the name Deltar. Personal life and death On May 5, 1927, van Veen married Hendrika ("Henny") Aalfs during his stay in Suriname. They had three children. Unfortunately, their marriage was not very happy. Although he came from a Dutch Reformed Church family, he converted to Christian Science until 1937, following his sister Anna, who lived in the United States. Van Veen suffered from a number of heart attacks, the first one in 1937 and later in 1948 a heavy one after his "four-island-plan" was rejected. In 1959 he had his last, fatal attack in the train when on his way to a meeting regarding his plan of a new harbour near Delfzijl, the Eemshaven. Publications (in English) Sand waves in the North Sea Hydrographic review, Vol. XII, No. 1 (May 1935) Measurements in the Straits of Dover, and their relation to the Netherlands coasts (1935) PhD thesis Utrecht University Water movements in the Straits of Dover J. of Marine Research Vol. 13, no. 1 (1938) ; p. 7-36 The analogy between tides and electrical currents Rijkswaterstaat BER037, Analogy between Tides and A.C. Electricity The Engineer, dec 1947 (pp 498, 520. 544) Research of Tidal Rivers in the Netherlands: a successful combination of theory and practice Dock & Harbour Authority, Vol. 27, Nos. 313 and 314, November and December 1946 Estimates of tidal currents in The Panama Canal Zone (1947, unclear origin) The calculation of tides in new channels Transactions American Geophysical Union, 1947, Volume 28, Issue 6 Dredge, Drain Reclaim (5th edition, 1960) Martinus Nijhof Ebb and flood channel systems in the Dutch tidal waters Bilingual version of a paper published in 1950 in the Journal of the Dutch Geographic VII. 67, 1950, 303-325 Tidal Gullies in youngest peat layer of Groningen Proc. Int. Congress Sedimentology, Netherlands (1951) pp. 257–266 Coasts, estuaries and tidal hydraulics Chapter from the "Civil Engineering Reference Book", edited by E.H. Probst and J. Comrie 1951 (pp1071–1106) English and Dutch methods of shore protection (correspondence on a article with R.R. Minikin) The Dock and Harour Authority, May–June 1952 discussion