Kaján Imre szerk.: Vásárhelyi Pál és a reformkori mérnökgeneráció (Budapest, 1995)

Dr. Deák Antal András: A Reformkor Mérnöke - Vásárhelyi Pál 13

Im Jahre 1845 beauftragte ihn István Széchenyi mit der Planung eines Projektes für die Theißregelung . Aufgrund der zur Verfügung stehenden, früher schon seit einem Jahrzehnt teilweise unter seiner Leitung gesammelten kartographischen Angaben über die Theiß hatte er seinen, das ganze Theiß-Tal vor Augen behaltenden, allgemeinen Wasserordnungsplan erstellt, der als Basis für die darauffolgenden, das hydrographische Bild des Theiß-Tals umwandelnden grossen Arbeiten diente. Während der Diskussion und Verteidigung seines Projektes starb er am 8. April 1846 an Herzinfarkt. DR. ANDRÁS ANTAL DEÁK: THE ENGINEER OF THE REFORM ERA PÁL VÁSÁRHELYI He was born 200 years ago (on the 25. Mars 1795) "in the era of the national awakening to the consciousness" in Szepes-Olaszi (Wallendorf, today Spisské Vlachy). His character, knowledge and the great tasks charged onto him have lifted him a.bove his contermporaries. He started with his career near János Losonczi, county engineer as engineer's assistant. His talent is well shown that after studying two semesters he took the examination with "eminent" marks form the subjects "Geometria Practica, Mechanica, Oeconomia Rurali and Mathesi Sublimiori". He dealt with the fee estate and forest surveys between 1817 and 1818 in the counties Zemplén and Veszprém. At this time the hydrographie survey was aiming at the regulation of the water system of the Danube and Tisza in Hungary. Vásárhelyi was charged with the hydrographie and hydrometric survey of a section of the Tisza and then those of the rivers Körös, Berettyó and the other rivers being in connection with them. He accomplished those tasks under the leadership of the excellent directing engineer Mátyás Huszár together with his 12 engineer-companions between 1819 and 1829 and then for mapping the Danube. He summarized the experiences of the tasks meaning an unmatched challenge in a book having the title " Introductio in praxim tirangulationis", to wich he wrote a supplement in German language for the promotion of the solution of the more difficult triangulation tasks with the title "Auflösung einiger Wichtigen Aufgaben als Beitrag zum geometrischen Triangulieren". He was appointed to the place of Mályás Huszár as the directorof the Danube-survey and at the same time to the temporary navigation director of the Lower Danube section. In his new function he continued the survey of the Danube and as it was said in an appreciative letter by Rauchmüller von Ehrenstein "Königlicher Rath und Landes Ober Bau Director", he produced together with his engineer companions an "incredible volume of survey drawings" of high quality. Pál Vásárhelyi was appointed to the leading engineer and project planning engineer of the two greatest water egulation works started in the first half of the nineteenth century. The first out of those tasks was the regulation of the Lower Danube (1833-46). Vásárhelyi "scanned the critical bed-sections having cascades for every meter length, made depth- and water-flow measures and he mapped all those data. He exploded bottom rocks, designed navigation channel and he mapped all those data. He exploded bottom rocks, designed navigation channel and locks. He produced the plan of a commercial and towing way having a length of 122 km on the left side of the Danube and made it 16