Excerpt from New High School Algebra Historical note. - The symbol, X, was first used by an English man; Oughtred, about 1631. The symbol, was introduced by Leibnitz in 1693. Multiplication was indicated as early as the thirteenth century, in Hindu and Italian books, by simply writing the factors Side by Side. This method was forgotten for a time, and was reintroduced by German algebraists during the fifteenth century. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.