Photographic and Optical Electric Lamps: A Treatise for Photographers, Photo-Electric Printers', Etchers and Engravers, and Including Apparatus for Copying Purposes for Engineers and Architects (Classic Reprint)
Photographic and Optical Electric Lamps: A Treatise for Photographers, Photo-Electric Printers', Etchers and Engravers, and Including Apparatus for Copying Purposes for Engineers and Architects (Classic Reprint)
Excerpt from Photographic and Optical Electric Lamps: A Treatise for Photographers, Photo-Electric Printers', Etchers and Engravers, and Including Apparatus for Copying Purposes for Engineers and Architects This diversity seems a most extraordinary thing, and it is certainly a reflection against the whole body of electrical engineers that such differences should have sprung 1nto existence, causing, quite unnecessarily, great inconvenience, expense, and trouble. For there is no earthly reason why the frequency should not be ...
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Excerpt from Photographic and Optical Electric Lamps: A Treatise for Photographers, Photo-Electric Printers', Etchers and Engravers, and Including Apparatus for Copying Purposes for Engineers and Architects This diversity seems a most extraordinary thing, and it is certainly a reflection against the whole body of electrical engineers that such differences should have sprung 1nto existence, causing, quite unnecessarily, great inconvenience, expense, and trouble. For there is no earthly reason why the frequency should not be the same all the world over if electrical engineers would only agree among themselves to use one common frequency. This could have been as easily done as it was easy to agree upon a standard Ohm, Volt, or Ampere unit. Unfortunately no agreement was made, and a number of supplies are laid on, in which the frequency cannot now be altered. The photographer uses principally the arc-lamp, and this lamp hums disagreeably in unison with the pulsations of the alternating current. This often forms an objection to alternating currents for arc-lighting, especially in portraiture, where it is apt to disturb the sitter. The author invented an apparatus for the purpose of converting alternating into continuous current, and thereby enabling photographers to obtain the advantages of continuous currents, although they may have the misfortune to be situated in a district supplied by alternating currents. The continuous current supplied. In different places differs only in pressure. Electrical engineers have stupidly blundered in this respect also, for nothing could have been easier than to agree upon one common pressure of supply, and thereby have made it possible to work the same apparatus anywhere. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... 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.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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