KRAYENHOFF

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2.6.1758 Nijmegen/NL - 24.11.1840 Nijmegen/NL
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Cornelis Krayenhoff gradated in science from the College of Harderwijk in 1780. He mounted the first lightning rod on the bell tower of Doesburg in 1782. He also gained a diploma in medicine two years later. When the French army occupied - or liberated - Holland in 1795 the patriot Krayenhoff was persuaded to give up medicine for a military career. After having been appointed general of engineers, he became minister of war under King Louis Bonaparte. Krayenhoff studied fortification and strengthened the defenses of Amsterdam until Napoleon ordered the Dutch King to cease further extensions. Napoleon admired in 1811 Krayenhoff's defense works during a visit to the Dutch Kingdom.
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Besides triangulation works for an accurate map of Holland, Krayenhoff rendered an example of his inventiveness in gauging the average stream velocity. A hollow cylinder, partly emergent and held in a vertical position by lead disks, floats along at mean velocity in a certain tract, when the adjusted load keeps its lower end just clear from the bottom. The float method was developed during the 19th century but later rejected because of serious errors and disadvantages. In 1813, he published a comprehensive set of hydrographic and topographic tables for Holland. This early work is of considerable value as it gives detailed records of discharge using the slope of the water surface. Under King William I, Krayenhoff was occupied with fortifications and with hydraulic engineering, relating to large rivers and draining lakes. Pensioned in 1830, he devoted his time to physics and astronomy. An auto-biography was published in 1844.
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Bergh, F. van den (2006). Portrait of Cornelius Rudolphus Theodorus Krayenhoff. P
Krayenhoff, C.R.T. (1813). Hydrographische en topographische waarnemingen in Holland
door den Oud-minister van Oorlog Krayenhoff. Amsterdam.
Krayenhoff, C.R.T. (1823). Proeve van een ontwerp tot scheiding der rivieren de Whaal en de Maas, en het doen afloopen dezer laatste, over hare oude bedding. Vieweg: Nijmegen. Krayenhoff, C.R.T. (1844). Levensbijzonderheden van den Leutenant-Generaal Baron Krayenhoff, door hem zelven in schrift gesteld en op zijn verlangen in het licht gegeven door Mr. H.W. Tydeman: Nijmegen.
Nieuwenkamp, W. (1973). Krayenhoff, Cornelis Rudolphus Theodorus. Dictionary of scientific biography 7: 499-501.
Tydeman, H.W., Krayenhoff, C.R.T. (1844). Levensbijzonderheden van den luitenant-generaal baron C.R.T. Krayenhoff. Vieweg: Nijmegen.

Hydraulicians in Europe 1800-2000 . 2013.

Look at other dictionaries:

  • Krayenhoff — Krayenhoff, Cornelius Rudolph Theodor, geb. 1759 in Nimwegen; war erst Arzt in Amsterdam, wurde 1795 Militär unter den holländischen Republikanern u. avancirte 1798 zum Oberstlieutenant u. Generalinspector des Fortificationswesens, wo er eine… …   Pierer's Universal-Lexikon

  • Krayenhoff — Krayenhoff, Cornelis Rudolf Theodor, Baron, niederländ. General, geb. 2. Juni 1758 in Nimwegen, gest. 24. Nov. 1840, studierte in Harderwijk Medizin und praktizierte nachher in Amsterdam. Beim Ausbruch der bürgerlichen Unruhen in Holland (1795)… …   Meyers Großes Konversations-Lexikon

  • Krayenhoff — Krayenhoff, Cornelius Rudolf Theodor, geb. 1758 zu Nimwegen, gest. 1846, holländ. General, durch Tapferkeit und Geschicklichkeit als Ingenieur ausgezeichnet, unter Ludwig Napoleon Kriegsminister, später Orangist, nach 1815 Gouverneur von Curaçao …   Herders Conversations-Lexikon

  • Krayenhoff — Cornelis Rudolphus Theodorus Krayenhoff Corneli(u)s Rudolphus Theodorus (seit 1815 Baron) Krayenhoff (* 2. Juni 1758 in Nimwegen; † 24. November 1840 ebenda) war ein niederländischer Arzt, General, Kartograf und Minister. Leben Krayenhoff… …   Deutsch Wikipedia

  • KRAYENHOFF, Baron Cornelius Rudolphus Theo Dorus — (1758–1840)    Cartographer. Initially Krayenhoff practiced as a physician in Amsterdam. As a friend of Herman Willem Daendels, he became one of the Patriots who realized the Batavian Revolution in 1795. The next year, he was appointed director… …   Historical Dictionary of the Netherlands

  • Cornelis Rudolphus Theodorus Krayenhoff — Corneli(u)s Rudolphus Theodorus, Baron Krayenhoff[1] (Nijmegen, 2 June 1758 Nijmegen, 24 November 1840) was a physicist, artist, general, hydraulic engineer …   Wikipedia

  • Cornelius Rudolf Theodor Krayenhoff — Cornelis Rudolphus Theodorus Krayenhoff Corneli(u)s Rudolphus Theodorus (seit 1815 Baron) Krayenhoff (* 2. Juni 1758 in Nimwegen; † 24. November 1840 ebenda) war ein niederländischer Arzt, General, Kartograf und Minister. Leben Krayenhoff… …   Deutsch Wikipedia

  • Cornelius Rudolphus Theodorus Krayenhoff — Cornelis Rudolphus Theodorus Krayenhoff Corneli(u)s Rudolphus Theodorus (seit 1815 Baron) Krayenhoff (* 2. Juni 1758 in Nimwegen; † 24. November 1840 ebenda) war ein niederländischer Arzt, General, Kartograf und Minister. Leben Krayenhoff… …   Deutsch Wikipedia

  • Cornelis Rudolphus Theodorus Krayenhoff — Corneli(u)s Rudolphus Theodorus (seit 1815 Baron) Krayenhoff (* 2. Juni 1758 in Nimwegen; † 24. November 1840 ebenda) war ein niederländischer Arzt, General, Kartograf und Minister. Leben Krayenhoff studierte an der …   Deutsch Wikipedia

  • Révolution batave — Krayenhoff prend congé de Daendels avant son départ de Maarssen pour Amsterdam, 18 janvier 1795, par Adriaan de Lelie et Egbert van Drielst. La Révolution batave (en néerlandais : Bataafse Revolutie) est le nom donné aux événements de 1780 à …   Wikipédia en Français

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