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Excerpt from Die Brillen, das Dioptrische Fernrohr und Mikroskop: Ein Handbuch für Praktische Optiker 9ioch ift (nach 23010 auf her Siehhaut ein hiefelbe behecfenher intenfimr 2311r1111r, her (c)ehpurpur, hervor anheben, her (nach Rühn) role eine empfiuhliche photogrw phifche Sl$laiie wirft, aber im ßichte fchnell bergeht, unh auch im i)unfelu nach hem iohe nicht viel uber 24 @tunhen er: halten bleibt. 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.