Excerpt from Documents and Their Scientific Examination: With Especial Reference to the Chemistry Involved in Cases of Suspected Forgery, Investigation of Disputed Documents, Handwriting, Etc In connection with the chemical examination of docu ments I am privileged to make use of numerous details of cases and observations recorded by Mr. A. Lucas, Director of the Government Laboratory, Cairo, whose 'excellent work on Forensic Chemistry contains short sections on the subject. My best thanks are also due to Mr. A. E. Osborn of New York for valuable information kindly sent to me, and for several illustrations, as well as for per mission to quote from his standard work Questioned Documents. The Publication Committee of the Journal of the Society of Chemical Industry has kindly lent the blocks of photomicrographs of pencil markings illustrating a communication of mine to that Journal, for which I am grateful. 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.