This book is a reprint of Silvanus P. Thompson's classic calculus textbook. I'm reprinting it here for my own student's ease of use but this century old classic belongs on the shelf of any math student. It is the most approachable calculus introduction I've seen and was written in the days way before calculators and computers. As a result, the sample problems presented are of the type that can be completed by hand with no technology required. This simple approach combined with an author with a good sense of humor makes this book a good starting point or quick reference book for anyone interested in learning calculus. - Dr. Mike Hollis