This early work on conic sections is both expensive and hard to find in its first edition. It contains a comprehensive account of the mathematics of conics as expressed by Apollonius of Perga. This is a fascinating work and highly recommended for anyone interested in learning about mathematics and its history. Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.