""The Slide Rule, And How To Use It"" is a book written by Charles Hoare in 1868. The book provides a comprehensive guide to using the slide rule, a popular tool for performing mathematical calculations in the 19th century. The guide includes full, easy, and simple instructions for performing all types of business calculations with unexampled rapidity and accuracy. The book covers topics such as multiplication, division, square roots, and logarithms, and includes numerous examples and exercises to help readers master the use of the slide rule. This book is a valuable resource for anyone interested in the history of mathematical tools and techniques, as well as for those who wish to learn how to use the slide rule for practical purposes.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.