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Excerpt from Report on British Standard Tungsten Filament Glow Lamps (Vacuum Type) For Automobiles The lamps dealt with are intended to have an approximate efficiency of one watt per candle and the description Vacuum type is used throughout this Report in order to distinguish them from the new Gas-filled or half-watt lamps which have been recently introduced. It is intended to increase the scope of this Report to cover the latter type of lamp when further progress has been made with their manufacture, and at the same time to deal with the tolerances to be allowed on the lamp cap dimensions. 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.