Franz Ignatz Cassian Hallaschka; Czech: František Ignác Kassián Halaška (10 July 1780, Bautsch – 12 July 1847,

Prague Prague ( ; cs, Praha ; german: Prag, ; la, Praga) is the capital and largest city in the Czech Republic, and the historical capital of Bohemia. On the Vltava river, Prague is home to about 1.3 million people. The city has a temperate ...

) was a Moravian

physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate caus ...

. In 1799 he became a member of the

Piarists The Piarists (), officially named the Order of Poor Clerics Regular of the Mother of God of the Pious Schools ( la, Ordo Clericorum Regularium pauperum Matris Dei Scholarum Piarum), abbreviated SchP, is a religious order of clerics regular of the ...

. He studied mathematics, physics, philosophy and

theology Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the ...

at schools in Strassnitz,

Nikolsburg Mikulov (; german: Nikolsburg; yi, ניקאלשבורג, ''Nikolshburg'') is a town in Břeclav District in the South Moravian Region of the Czech Republic. It has about 7,400 inhabitants. The historic centre of Mikulov is well preserved and i ...

and Kremsier, receiving his

ordination Ordination is the process by which individuals are Consecration, consecrated, that is, set apart and elevated from the laity class to the clergy, who are thus then authorization, authorized (usually by the religious denomination, denominational ...

in April 1804. In 1806 he taught classes in mathematics and physics at the Ordenscollegium in Nikolsburg, and during the following year, obtained his PhD at the

University of Vienna The University of Vienna (german: Universität Wien) is a public research university located in Vienna, Austria. It was founded by Duke Rudolph IV in 1365 and is the oldest university in the German-speaking world. With its long and rich histor ...

. In 1808 he became a professor of physics in

Brünn Brno ( , ; german: Brünn ) is a Statutory city (Czech Republic), city in the South Moravian Region of the Czech Republic. Located at the confluence of the Svitava (river), Svitava and Svratka (river), Svratka rivers, Brno has about 380,000 inha ...

, where he established an

observatory An observatory is a location used for observing terrestrial, marine, or celestial events. Astronomy, climatology/meteorology, geophysical, oceanography and volcanology are examples of disciplines for which observatories have been constructed. His ...

. From 1814 to 1833 he was a professor of physics at the University of Prague. In 1816 he published "'", a work in which he calculated all

solar eclipse A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of the Earth, totally or partially. Such an alignment occurs during an eclipse season, approximately every six month ...

s observable from the Earth for the years 1816 up until 1860. In 1823 he became a member of the

Royal Bohemian Society of Sciences Royal Bohemian Society of Sciences ( la, Regia Societas Scientiarum Bohemica; german: Königliche böhmische Gesellschaft der Wissenschaften; cs, Královská česká společnost nauk) was established in 1784 – originally without the adjective " ...

, and in 1831 was appointed university

rector Rector (Latin for the member of a vessel's crew who steers) may refer to: Style or title *Rector (ecclesiastical), a cleric who functions as an administrative leader in some Christian denominations *Rector (academia), a senior official in an edu ...

.BLKÖ:Hallaschka, Franz Ignaz Cassian
Biographisches Lexikon des Kaiserthums Oesterreich (author

Constantin von Wurzbach Constantin Wurzbach Ritter von Tannenberg (11 April 1818 – 17 August 1893) was an Austrian biographer, lexicographer and author. Biography He was born in Laibach, Carniola (present-day Ljubljana, Slovenia).He later went on to complete a cou ...

).ADB:Halaschka, Franz Ignaz Cassian
In:

Allgemeine Deutsche Biographie ''Allgemeine Deutsche Biographie'' (ADB, german: Universal German Biography) is one of the most important and comprehensive biographical reference works in the German language. It was published by the Historical Commission of the Bavarian Aca ...

(ADB). Band 10, Duncker & Humblot, Leipzig 1879, S. 397 f. In 1833 he was named a government counselor and a referent to the ' at Vienna. From 1838 until his death he served as a provost to Alt-Bunzlau and as a country

prelate A prelate () is a high-ranking member of the Christian clergy who is an ordinary or who ranks in precedence with ordinaries. The word derives from the Latin , the past participle of , which means 'carry before', 'be set above or over' or 'pref ...

Bohemia Bohemia ( ; cs, Čechy ; ; hsb, Čěska; szl, Czechy) is the westernmost and largest historical region of the Czech Republic. Bohemia can also refer to a wider area consisting of the historical Lands of the Bohemian Crown ruled by the Bohem ...

Selected works

* ', (The elements of eclipses), 1816. * ', 1822 – The Moravian city of Bautsch in geographic-topographical and historical relationships. * ', 1822 – Geographical localization of Alt-Bunzlau. * ', 1824 – Manual of nature philosophy. * ' (with Franz Xaver Heinrich Kreylich) 1826 – Geographical localization of Steinschönau.Most widely held works by Cassian Hallaschka
WorldCat Identities

References

{{DEFAULTSORT:Hallaschka, Franz Ignatz Cassian 1780 births 1847 deaths Academic staff of Charles University Academic staff of the University of Vienna 19th-century Austrian physicists Czech physicists People from Budišov nad Budišovkou Rectors of Charles University Czech Roman Catholic clergy 19th-century Austrian Roman Catholic priests Moravian-German people Piarists