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Mathematical Treasures - Gemma Frisius's Arithmeticae Methodus Facilis

Author(s): 
Frank J. Swetz and Victor J. Katz

Title page

This is the title page of the Arithmeticae Practicae Methodus Facilis (1540), by Gemma Frisius (originally Regnier Gemma) (1508-1555). Gemma Frisius was best known for his work in astronomy and map-making; he worked closely with Gerardus Mercator in making an early globe. He also suggested a method for determining longitude at sea.

Sig. D. f.1 r

On this page is an example of the use of double false position to solve a problem in two unknowns.

D f.4 v

Here, Gemma describes a method of finding square roots.

Dummy View - NOT TO BE DELETED