Karl Cleve

Karl Cleve (born May 2, 1901 in Berlin ; † August 17, 1979 ibid) was a German engineer and lepidopterist .

Life

Cleve became interested in entomology and ornithology as well as technology at a young age . His professional goal was to train as an engineer , studied mechanical engineering in Munich and Berlin and received his doctorate in 1928 under Oskar Knoblauch with the thesis on model experiments on water circulation in steep and inclined boilers . After completing his doctorate, he mainly worked for the Borsig company in Berlin and, at the same time, dealt intensively with entomological topics.

Engineering plant

Cleve wrote around 50 publications on his specialty, steam boiler construction , including a comparison and analogies of the energy conversion in a steam power plant and in the human organism. Further focal points were the operating results of various industrial plants equipped with traveling grids as well as questions about the water circulation in water tube boilers.

Technical fonts (selection)

• Experiments on the amount of steam discharged by high-lift safety valves , Journal of the Bavarian Revision Association, No. 14, 1931, pp. 165–168
• The development of coal dust firing , daily newspaper for breweries, No. 236, 1934
• The foaming of steam boilers , fuel heat power, VDI-Verlag, issue No. 8, 1949, pp. 209-215
• The operation of traveling grids , energy, volume 1, issue 3, Franzis-Verlag Munich, 1949
• The pre-calculation of the water circulation in water tube boilers , fuel heat power, VDI-Verlag, Volume 2, 1950, pp. 215-221
• Design of a steam boiler to cover energy peaks , Zeitschrift für Elektrizitätswirtschaft, Volume 52, Issue 4, 1953, pp. 80-82
• Steam boilers and furnaces for textile companies , Melliand Textile Reports, Heidelberg, Vol. 40 No. 4, 1959, pp. 442–445

Entomological work

After meeting Georg Warnecke , he specialized in topics related to lepidopterology . a. with Charles Boursin , Heinz Habeler , Friedrich Kasy , Gerhard Ringel and Ernst and Herta Urbahn, who worked in the same field , were further intensified. The focus was on:

• research into the causes of night butterflies approaching artificial light sources ,
• of melanism in butterflies, in particular the classical industrial ,
• Local faunistics , especially in the Berlin nature reserves Teufelsbruch , Rohrpfuhl and Pfaueninsel as well as a compilation of the species population of the butterfly species occurring in the Berlin area with some initial records for the area under consideration.
• Advance, spread and resettlement of butterfly species,
• Participation in the creation of the Red List of Endangered Species ,
• Breeding different types of butterflies,
• Migratory butterfly research .

Specimen copies from Cleve's butterfly collection, which mainly covers Central Europe, were also used as reference material for taxonomic studies. Cleve wrote about 110 publications on entomological topics.

Entomological writings (selection)

• The starlight and its presumed perception by butterflies flying at night . German Entomological Journal, New Series Volume 13, 1966, pp. 359-375
• The spectral perception of butterflies flying at night (Lep.) , Nachrichtenblatt der Bayerischen Entomologen, 16th year, 1967, pp. 33–53
• The approach of the night butterflies to the light and the bait. Entomological Journal, Volume 81, No. 12, Alfred Kernen Verlag, Stuttgart, 1971, pp. 371–387
• Research into the Causes of Melanistic Butterfly Shapes Over the Last Hundred Years , Journal of Applied Entomology, Vol. 65, 1970
• The advance of Eupithecia sinuosaria EV. in Central Europe (Lep. Geometridae). Communications from the German Entomological Society, Volume 29, 1970
• The butterflies of West Berlin , Berliner Naturschutzblätter, Volksbund Naturschutz e. V., Vol. 14, 18, 19, 20, 21, 22; 1970-1988
• Additions to the butterfly fauna of the eastern Neusiedlersee area , journal of the Association of Austrian Entomologists, 31st year, 1979

Individual evidence

1. ^ Association of German Engineers (VDI) (ed.): Research work in the field of engineering. Karl Cleve: Model tests on the water circulation in steep and inclined tube boilers , VDI-Verlag, Berlin, 1929
2. ↑ ^{a b} Manfred Gerstberger: In Memoriam Dr. Ing.Karl Cleve , Communications of the Entomological Society Basel, Volume 30, No. 2, 1980
3. ↑ Karl Cleve: The energy conversion in the steam power plant and in the human organism , fuel heat and power, Volume 4, No. 5, 1952, pp. 152-154
4. ^ D. Johnson: The advance calculation of the water circulation in water tube boilers , Schweizerische Bauzeitung, 69th year, No. 30, July 28, 1951, pp. 415-417