Saturday, November 12, 2011

Peter Apianus's trigonometry and geography

Title page of Petrus Apianus’ A Geographical Introduction (1534). In this book, he reviews the theories of Vernerus [Johannes Werner (1468-1522), a Nuremburg priest and mathematician who devised a method of using lunar observations to find longitude] and explains the applications of trigonometry (i.e. sines and chords) in geography.

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