""Quick and Easy Methods of Calculating"" by Robert Gordon Blaine is a comprehensive guide that explains the theory and use of various mathematical tools such as the slide-rule and logarithms. Published in 1903, this book provides a simple and accessible explanation of these mathematical concepts that were widely used at the time. The author covers the basics of arithmetic, algebra, and geometry, and then delves into more advanced topics such as trigonometry and calculus. The book is aimed at students and professionals who need to perform calculations quickly and accurately. It also includes numerous examples and exercises to help readers apply the concepts they have learned. Overall, ""Quick and Easy Methods of Calculating"" is a valuable resource for anyone who needs to perform mathematical calculations in their daily life or work.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.