Technikatörténeti szemle 11. (1979)
TANULMÁNYOK - Vajda Pál: Creative Hungarians in mathematics, astronomy, physics, chemistry, technical sciences and industry. A selected bio-bibliography
Végh A.: E. Schulek (= Acta China. Hung. 41/1964. p. 5.) WHC, SZA SCHULLER, Aladár (1886—1960). Chemical engineer. He worked in the field to photo-chemistry with the Belgian firm Gevaert and elaborated new processes in cellulose chemistry and photographic film casting. The Gevaert firm produced in 1937 the first non-flammable security film material on the basis of his inventions. In memóriám de Heer Alain Schuller (— Gevaert Post 8/1960. nr. 6. p. 88.) SEIDNER, Mihály (1875—1968). Mechanical engineer. Following his studies on energy-economy, his book „Energiewirtschaft”, appeared in 1930, was the first study in the world that discusses the thermal- and hydraulic energy-economy as a scientific system. His invention in 1917 — direct liquid-cooling of stators and rotors of electric machines — was the first in the world. Seidner’s new invention, the principle of liquid-cooling of turbogenerators, was patented in 1957. By liquid-cooling, the outer diameter of the machine can be reduced to fit railway loading gauges, for the stator insulation cheap paper can be used instead of mica, generator voltage can be increased up to 25 kV and the cumbersome hydrogen cooling can be dispensed with. The invention offers a general and practical solution of the complex problems arising in connection with direct cooling. Dr. Marquard in „Die Bautechnik” H. 41. 1930., H. Albrecht in „Elektrotechnische Zeitschrift H. 38. 1930., M. Gercke in „Archiv für Wärmewirtschaft und Dampfkesselwesen” H. 1. 1931., S. Parker Smith in „The Electrician” March 7. 1930., „Engineering” Apr. 17. 1931.', P. Vajda: Hungarian Invention Bought by Swiss Company (— Hungarian Exporter 1965. nr. 6. p. 7.), VPMS Jan. 1961. p. 2. VHP ’SIGMOND, Elek (1873—1939). Chemical engineer. As early as the first years of the century ’Sigmond elaborated a new chemical process for determining the soluble phosphoric acid content of the soil. He extended the process in the thirties to the determination of the potassium content of the soil. His most important scientific and practical work was in the research of alkali soils. The main part of his activity covered the field of soil sciences in his chef-d’oeuvre „The Principles of Soil Sciences (London/1938)”. ’Sigmond activity played a strong part in developing soil sciences as an independent science. D. J. Hissink—E. J. Russel—A. Demolon—F. Schucht: A. A. J. von ,Sigmond (Proceedings of the International Society of Soil Science 8/1933. pp. 4—6.), S. A. Waksman: Al. ’Sigmond (= Soil Science 49/1940. pp. 251—252.) HYFC SELÉNYI, Pál (1896—1954). Physicist. Selényi’s most fundamental contribution to physics dates back to before the First World War. By an ingenious method, using a fluorescent coating on a total reflecting prism, he demonstrated the coherence of light rays emitted in nearly opposite directions from this fluorescent light source. His experiment produced immediate appreciation and remained one of the fundamental expe67
