Excerpt from Nist Standard Reference Materials Catalog, 1998-1999 Historically, Standard Reference Materials (srms) have been used as vehicles-for transferring National Institute of Standards and Technology (formerly National Bureau of Standards) measurement science and technology through channels of industry and commerce, to the country at large. Each new srm is the result of collabora tion between nist and representatives of science and industry. Srms are crucial reference points in establishing a comprehensive measurement system for the whole nation. Such a system, which has incrementally improved throughout the years, has met the needs of us. Industry and commerce for nearly 100 years and continues to evolve as it is called upon to meet more increasing demands in measurements. The fast pace of technological change, coupled with increased demands on quality, traceability and srm types, are making the perpetuation of the existing system into the future a very challenging proposition. 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.