Introduction to Quaternions: With Numerous Examples is a book written by Philip Kelland and first published in 1873. The book is a comprehensive guide to quaternions, a mathematical concept that extends the complex numbers to four dimensions. The book begins with an introduction to the concept of quaternions and their history, followed by a discussion of their properties and applications in various fields such as physics, engineering, and computer graphics. The author provides numerous examples and exercises throughout the book to help readers understand the concept of quaternions and how they can be used. The book is written in a clear and concise manner, making it accessible to both students and professionals in the field of mathematics. Overall, Introduction to Quaternions: With Numerous Examples is an essential reference for anyone interested in learning about quaternions and their applications.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.