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Excerpt from Research and Development in Applied Optics and Optical Glass at the National Bureau of Standards: A Review and Bibliography The work at the National Bureau of Standards on refractometers, range finders, lens design, and photogrammetry, because of its extent and im portance, will be discussed 111 special sections which follow. Investigations of a general nature related to all optical instruments have involved a study of resolving power the preparation of stand ard resolving-power charts with instructions for their use in testing camera lenses (12, the publication of detailed instructions for the pro duction of mirrors by chemical deposition of silver on glass and the development of an interference method, based on the Hartmann test, for/ determining the aberrations of an optical system (47. 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.