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Mathematical Treasures - Leonard Digges' Tectonicon

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

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This is the title page of the Tectonicon by Leonard Digges (1520-1559), a 1634 edition of the work originally published in 1556. Digges was an English astronomer, mathematician, and instrument maker, credited with the invention of the reflecting telescope and the theodolite. His book discusses methods of measurement.

Introduction

At the beginning of the book, Digges discusses basic ideas of arithmetic, preliminary to dealing with measurement.

Measurement

On page 4, basic ideas of measurement are discussed.

Circles

And on page 5, we have definitions of various parts of the circle. See also images from Stratioticos, by Leonard Digges, and from Pantometria, by Leonard Digges and his son, Thomas Digges.

Frank J. Swetz and Victor J. Katz, "Mathematical Treasures - Leonard Digges' Tectonicon," Loci (January 2011)

Dummy View - NOT TO BE DELETED

Mathematical Treasures