Gemma Frisius

John Dee and his World of Science and Magic

John Dee and his World of Science and Magic

On July 13, 1527, Welsh mathematician, astronomer, astrologer, occultist, navigator, imperialist and consultant to Queen Elizabeth I, John Dee was born. He is considered one of the most learned men of his age. Besides being an ardent promoter of mathematics and a respected astronomer, in his later years he immersed himself in the worlds of magic, astrology and Hermetic philosophy. One of his aims was attempting to commune with angels in order to…
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The Chronometers of Thomas Earnshaw

The Chronometers of Thomas Earnshaw

On February 4, 1749, English watchmaker Thomas Earnshaw was born. Earnshaw further simplified the process of marine chronometer production, making them available to the general public. He is also known for his improvements to the transit clock at the Royal Greenwich Observatory in London and his invention of a chronometer escapement and a form of bimetallic compensation balance. Improving Marine Timekeepers Thomas Earnshaw was born at Ashton under Lyne, Lancashire. He became…
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The Most Accurate Instruments of Gemma Frisius

The Most Accurate Instruments of Gemma Frisius

On December 9, 1508, physician, mathematician, cartographer, philosopher, and instrument maker Gemma Frisius was born. He created important globes, improved the mathematical instruments of his day and applied mathematics in new ways to surveying and navigation. Reinerus Gemma was born in Dokkum, Friesland, a coastal province in northern Netherlands, of poor parents who died when he was young. He only adopted the name Frisius when he later became a scholar for, like…
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Gerardus Mercator – The Man who Mapped the Planet

Gerardus Mercator – The Man who Mapped the Planet

Mercator’s Map of Europe On December 2, 1594, German cartographer, philosopher and mathematician Gerardus Mercator passed away. He is best known for his work in cartography, particular the world map of 1569 based on a new projection which represented sailing courses of constant bearing as straight lines. He was the first to use the term Atlas for a collection of maps. Gerardus Mercator (1512 – 1594) The son of a shoemaker, Gerard…
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