1573-1649.
Engelsk upptäcktsresande och kartograf. Han studerade i Oxford och blev framförallt duktig i matematik. 1594 ledde han en expedition till Västindien och han var även i Orinoco och Ghana. Han slog sig senare ner i Florens där han höll på med skeppsbygge och annat ingenjörsarbete. 1646-47 gav han ut ett stort verk, 'Dell Arcano del Mare' som i 6 delar behandlar sjörätt, praktiskt sjömanskap och navigation, skeppsbygge m.m., samt 131 sjökort över hela världen. En nyutgåva kom 1661. Båda hör till rariteterna inom sitt område.
Bland arbeten.
Dell Arcano del Mare.
Phillips. - Tooley.
1537-87.
Son till Gerard Mercator. Arbetade med sin bror Rumold (se denne) i fadern Gerard Mercators (se denne) företag.
Frisius, Gemma. [Reinerszoon, Jemme.]
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...
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)
Amiral Häggs flaggkarta. - Stockholm 1888.
Målhammar - 'Sveriges Industri, dess Stormän och Befrämjare' ca 1900.
