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Excerpt from Complete Catalogue of Electrical Measuring and Test Instruments Manufactured by Hartmann and Braun Large Size Telescopes, fully mounted, in Well designed massive framework; absolutely without iron. Telescope with powerful objective, Steinheil eye-piece, rack and pinion adjustment to do, which is available down to 1 metre distance from the object; vertical and horizontal micro meter adjustments. Angle of elevation 50 - 600, Scale holder for use with wood or glass scales, adjustable for height and fitted with swivel arrangement for use with upright scale. To facilitate accurate adjustment on to the mirror, the upper part of the instrument is adjustable by means of rack and pinion for 60 - 75 mm from the tripod base, which is fitted with levelling screws. 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.