Excerpt from Die Brillen, das Dioptrische Fernrohr und Mikroskop: Ein Handbuch für Praktische Optiker9ioch ift (nach 23010 auf her Siehhaut ein hiefelbe behecfenher intenfimr 2311r1111r, her ©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 PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.