Excerpt from Disclosures on New Syntheses of Perfluorostyrene and Other Highly Fluorinated Derivatives; Temperature-Radiation-and Vacuum-Resistant Magnetic Tape; Conductometric Titration Cell; Mill Work Positioner: Process for Fabricating Superconducting Microbridges; Apparatus for Displaying Average Wind Vane or Other Shaft Position; Document Numbering Machine Responsive to a Staple in a Print Area for Printing in an Alternate Area This nbs Technical Note is one of a continuing series entitled Disclosures on This series consists of short descriptions of recent developments from the Department of Commerce primary operating units, depart 'menta1 staff offices, and their contractors. It is believed that these developments have important commercial applications. Unless otherwise stated in the description of a development, the property rights therein have been retained by the United States as represented by the Secretary of Commerce. Previous nbs Technical Notes in this series are nbs Technical Notes 237, 253, 263, 282, 287, 295, 437, 440 and 536. 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.