Doctor Medicine & Mathematics, cartographer,
Bentheim Blaeu 1635, 1649 & 1662;
Bentheim, Hondius 1633.
Engelsk kartograf. Han började sin verksamhet som kartritare omkring 1720, utgav 1744-47 'Complete System of Geography' med 70 kartor, 1752 'Complete Atlas, or Distinct View of the Known World', 1758 'Atlas Minimus' och 1767 'Large English Atlas'. Han utförde även kartor för olika historiska verk och reseskildringar, och var kartgravör både för Kung George II av England och Ludvig XV av Frankrike.
Complete System of Geography.
Complete Atlas, or Distinct View of the Known World.
Large English Atlas.
Dict. nat. biogr. [Ths.B.] - Phillips. - Tooley.
Engelsk kopparstickare. Inga övriga upplysningar hittade, om han inte är identisk med den J. Cross som nämns av Thieme-Becker. Från dennes hand kom särskilt heraldiska exlibris och porträtt (ca. 1820-60).
Amiral Häggs flaggkarta. - Stockholm 1888.
Tarald, Silene latifolia - Lindman, C. A. M, Bilder ur Nordens Flora 1917-26.
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.
(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)