The Mathematicall Praeface to the Elements of Geometrie of Euclid of Megara is a book written by Dr. John Dee. It is a preface to Euclid's Elements of Geometry, which is one of the most important mathematical works ever written. The book provides an introduction to the principles of geometry and outlines the basic concepts and theorems that are used in Euclid's work. It also includes a discussion of the history of geometry and its importance in various fields, such as architecture, engineering, and astronomy. The Mathematicall Praeface is considered a significant work in the history of mathematics and has been studied by mathematicians and scholars for centuries. It is written in English and is accessible to a wide range of readers interested in mathematics and its history.1570. Dee's occult philosophy of mathematics.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.