Download or read book Measuring the Earth written by Mary Gow and published by Enslow Publishing, LLC. This book was released on 2009-07-01 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A biography of ancient Greek mathematician Eratosthenes, who used geometry to calculate the circumference of the earth. He is also known as the Father of Geography"--Provided by publisher.