This is a new release of the original 1939 edition.

Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

This omnibus volume contains three books wherein methods and techniques that provide greater skill and dexterity in calculations of all kinds. The first book provides methods for performing arithmetical calculations quickly, and solving problems mentally. The second book fully treats the slide rule and its many applications. The third book presents recreational mathematics, a source of never-ending enjoyment for the mathematically minded.

Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

The book was written for all of you, who watch horse racing only to find themselves lost, wanting to know more about the sport, but not knowing where to begin. Perhaps you're a regular race watcher, who ends up spending all of their time explaining the sport to their accompanying friends and loved ones. It's not like you don't want them sharing in the enjoyment of a sport you love, but how many questions can you really answer? Or you may be someone who just visits the track for those special race days. You want to go more often, but just don't know how to learn more about this great sport. This book may just be the help you're looking for, as it offers a unique perspective on how to enjoy horse racing. By the end of our lively and amusing discussion on how to handicap with your head, eyes, blood, gut, heart, and by your tail, the reader will be able to converse comfortably on any of the sport's diverse aspects. Most importantly, they will learn how to have fun at the track.

Brush up on your math skills with fun games and puzzles.