Theologians 18th century
Jacques Basnage de Beauval was a French theologian and historian, diplomat and writer.
His father was a prominent lawyer and his grandfather and great-grandfather were pastors, Jacques studied theology and languages at the Academy of Saumur, then at Geneva and Sedan. In 1676, Jacques Basnage was appointed pastor at Rouen during the revocation of the Edict of Nantes, was forced to flee France for Holland, where he worked as a theologian, polemicist, historian, and diplomat in the service of the Grand Pensioner Hensius.
In 1717, on behalf of Holland, Basnage was sent to sign the treaty of the Triple Alliance (France, Holland, England). In the Annals of the United Provinces (1719-1726), compiled from the peace negotiations held at Münster, he displays breadth of vision, wisdom, and impartiality.
About 1719 Jacques Basnage was appointed historiographer of the Dutch states. He wrote several books on the Bible, the history of the Church, and the history of the Jewish people. Among the best known of these are his History of the Religion of the Protestant Denominations (1690), History of the Church of Jesus Christ to the Present Time (1699), written from Protestant positions, and History of the Jews (1706), as well as Jewish Antiquities, or Critical Notes on the Republic of the Jews (1713).
Bernard Bolzano, full name Bernard Placidus Johann Nepomuk Bolzano, was an Italian-born Czech scientist, mathematician, logician, philosopher and theologian.
Bolzano graduated from the University of Prague and was immediately appointed professor of philosophy and religion at the university. Within a few years, however, Bolzano had already shown himself to be a free thinker with his teachings on the social costs of militarism and the needlessness of war. He called for a complete reform of the educational, social, and economic systems that would direct the nation's interests toward peace rather than armed conflict between states. In 1819, Bolzano was expelled from the university for his beliefs and thereafter turned his full attention to works on social, religious, philosophical, and mathematical issues.
Bolzano held advanced views on logic, mathematical quantities, limits, and continuity. He is the author of the first rigorous theory of real numbers and one of the founders of set theory. In his studies of the physical aspects of force, space, and time, he proposed theories opposed to those advanced by the German philosopher Immanuel Kant. His contributions to logic, in particular, established his reputation as the greatest logician of his time. Much of his work remained unpublished during his lifetime and was not widely disseminated until the late nineteenth and early twentieth centuries, when a number of his conclusions were reached independently.
Bolzano was multi-talented in various fields of science to which he made significant contributions. His published works include The Binomial Theorem (1816), A Purely Analytic Proof (1817), The Functional Model and the Scientific Model (1834), An Attempt at a New Statement of Logic (1837), and The Paradoxes of Infinity (1851).
Among other things, Bolzano was also a great philanthropist. Together with his friends and students, he supported the activities of almshouses, homes for the blind, loan banks for the working class, libraries, and elementary schools in rural areas.
Étienne Chauvin was a French Protestant theologian and philosopher.
Chauvin's philosophy and worldview were entirely Cartesian. After his expulsion from Nîmes, Étienne Chauvin withdrew to Rotterdam, where he preached for several years in the Walloon Church. He was succeeded as professor of Baille at Rotterdam. In 1695 the Elector of Brandenburg appointed him pastor and professor of philosophy, and afterward inspector of the French college at Berlin.
Etienne Chauvin's major work is Lexicon Rationale, sive Thesaurus Philosophicus (1692). He also wrote Theses on the Knowledge of God (1662) and published the New Journal of Scholars (1694-1698).
Nicolas-Louis De la Caille was a French astronomer, abbot and educator.
He studied philosophy and theology, became an abbot, but the craving for science overpowered everything, and he studied astronomy on his own. In 1736, la Caille received a place at the Paris Observatory, in 1739 was appointed professor of mathematics at Mazarini-College in Paris and built his own observatory, where he conducted astronomical observations. In 1741 Lacaille was admitted to the Académie des Sciences.
La Caille was an outstanding astronomer: he observed more than 10,000 stars in the Southern Hemisphere and named 14 of the 88 constellations. In 1752, he made an astronomical expedition to the Cape of Good Hope, where he built an observatory and conducted a huge series of observations, including the discovery and cataloging of 42 nebulae. These studies led to la Caille being called "the father of southern astronomy," and his observations from South Africa of the Moon, Venus, and Mars, combined with similar observations already made in the Northern Hemisphere, led to the calculation of more accurate values for the distances to these bodies.
On his return to Paris two years later, in 1754, he resumed his post and taught at the school of Mazarin, continuing his work at the observatory of the College of Mazarini. Among his pupils was the great chemist Antoine Lavoisier. La Caille was a foreign honorary member of the St. Petersburg Academy of Sciences and a member of the Royal Society of London. His Coelum Australe Stelliferum ("Star Catalog of the Southern Sky") was published in 1763.
Giovanni Vincenzo Petrini was an Italian priest and theologian, philosopher, mathematician, and expert in mineralogy.
Along with Scipio Breislacus, Petrini was one of the founders of Italian volcanology. He taught philosophy and mathematics, theology, but specialized in mineralogy and created the Mineralogical Cabinet in Nazareth. This museum was famous in Europe and was visited, among others, by Emperor Joseph II, who gave him rare specimens from the lands of the Empire and especially from Hungary.
Giovanni Petrini was the author of the catalog Gabinetto mineralogico del Collegio Nazareno ("The Mineralogical Cabinet of the Nazarene Collegium, described by external features and distributed by component parts" (Rome, 1791-1792). The specimens in it are classified according to a standard structure: salts, earths, bitumens, combustibles, and metals. There is also a section on gemstones.
Giuseppe Piazzi was an Italian astronomer, mathematician and priest.
Around 1764 Piazzi became a Theatine priest, in 1779 he was appointed professor of theology in Rome, and in 1780 - professor of higher mathematics at the Academy of Palermo. Later, with the assistance of the Viceroy of Sicily, he founded an observatory in Palermo. There he compiled his great catalog of the positions of 7,646 stars and showed that most stars move relative to the Sun. There, on January 1, 1801, Piazzi also discovered the asteroid Ceres.
Giuseppe Piazzi's merits were appreciated: he was a member of the Royal Society of London, a foreign honorary member of the St. Petersburg Academy of Sciences and a foreign member of the Paris Academy of Sciences. A crater on the Moon is named in his honor.
Heinrich Jacob Sivers was a German Evangelical Lutheran theologian and scholar, poet and writer, naturalist and collector.
Sifers studied law and theology at the University of Kiel, and received his doctorate at the University of Rostock, where he lectured and wrote various works. He wrote many poems, sermons and ceremonial speeches in German, Swedish and Latin.
Heinrich Sivers also studied geology, traveled extensively in Scandinavia, and compiled his own mineral collection. In 1737 he sold many of his minerals, as well as a cabinet of Roman coins to Count Carl Gillenborg, today they can be seen at Lund University.