Cassini de Thury, César-François
17 June 1714 – 4 September 1784
César-François Cassini de Thury (17 June 1714 – 4 September 1784), also called Cassini III or Cassini de Thury, was a French astronomer and cartographer.
Cassini de Thury was born in Thury-sous-Clermont (Oise), the second son of Jacques Cassini and Suzanne Françoise Charpentier de Charmois. He was a grandson of Giovanni Domenico Cassini, and would become the father of Jean-Dominique Cassini, Comte de Cassini.
In 1735, he became a member of the French Academy of Sciences as a supernumerary adjunct astronomer, in 1741 as an adjunct astronomer, and in 1745 as a full member astronomer.
In January, 1751 he was elected a Fellow of the Royal Society.
He succeeded to his father’s official position in 1756 and continued the hereditary surveying operations. In 1744, he began the construction of a great topographical map of France, one of the landmarks in the history of cartography. Completed by his son Jean-Dominique, Cassini IV and published by the Académie des Sciences from 1744 to 1793, its 180 plates ar...
fl. 1785-1809.
Holländsk kartograf i slutet av 1700-talet. Han gav 1792 ut en atlas med 36 kartor, en stor del av dessa var nyutgåvor av äldre kartografers arbeten.
A bookseller and publisher who reproduced a small number of maps copied from his predecessors.
Phillips.
Engelsk karthandlare i början av 1700-talet, bosatt i London. Enligt honom själv handlade han med 'franska och holländska kartor till de fördelaktigaste priserna'. Vidare rekommmenderar han sina alla typer av 'Spectacles, Reading Glasses, Tellescopes, Perspective Glasses' etc. och uppmanar 'all the Artists in the Universe' till att komma till honom. Tooley upplyser torrt att han var lika mycket leksaksfabrikant som karthandlare. Han nämner dock ett antal kartor, samtliga utförda runt 1720.
Karta öfver Stockholm. - 1904.
Vit sötväppling, Melilotus albus - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.
Frisius, Gemma. [Reinerszoon, Jemme.]
Biografiska uppgifter:9 december 1508 - 25 maj 1555.
Gemma Frisius was a physician, mathematician, cartographer, philosopher, and instrument maker. He created important globes, improved the mathematical instruments of his day and applied mathematics in new ways to surveying and navigation.
Frisius was born in Dokkum, Friesland (present-day Netherlands) of poor parents, who died when he was young. He moved to Groningen and studied at the University in Leuven beginning in 1525. He received the degree of MD in 1536 and remained on the faculty of medicine in Leuven for the rest of his life. His oldest son, Cornelius Gemma, edited a posthumous volume of his work and continued to work with Ptolemaic astrological models.
While still a student, Frisius set up a workshop to produce globes and mathematical instruments. He became noted for the quality and accuracy of his instruments, which were praised by Tycho Brahe, among others. In 1533, he described for the first time the method of triangulation still used today in surveying. Twenty years later, he was the first to describe how an accurate clock could be used to determine longitude. Jean-Baptiste Morin (1583–1656) did not believe that Frisius' method for calculating longitude would work, remarking, 'I do not know if the Devil will succeed in making a longitude timekeeper but it is folly for man to try.'
Frisius created or improved many instruments, including the cross-staff, the astrolabe and the astronomical rings. His students included Gerardus Mercator (who became his collaborator), Johannes Stadius, John Dee, Andreas Vesalius and Rembert Dodoens.
A lunar crater has been named after him.
Bland arbeten:
(Cosmographia (1529) von Petrus Apianus, annotated by Gemma Frisius)
De principiis astronomiae et cosmographiae (1530)
De usu globi (1530)
Libellus de locorum describendorum ratione (1533)
Arithmeticae practicae methodus facilis (1540)
De annuli astronomici usu (1540)
De radio astronomico et geometrico (1545)
De astrolabio catholico (1556)
