Excerpt from Industrial Lighting Survey of the City of Chicago: A Thesis; June 2, 1921 With the wider application of artificial lighting, due to its appreciated worth, more efficient lighting installations are in demand. At present the tendency is for more foot-candles of illumination. These conditions require refinements, which were formerly considered unimportant; the selection and spacing of lighting units, coefficient of utilization, depreciation of the system and other factors which influence the efficiency of the ...
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Excerpt from Industrial Lighting Survey of the City of Chicago: A Thesis; June 2, 1921 With the wider application of artificial lighting, due to its appreciated worth, more efficient lighting installations are in demand. At present the tendency is for more foot-candles of illumination. These conditions require refinements, which were formerly considered unimportant; the selection and spacing of lighting units, coefficient of utilization, depreciation of the system and other factors which influence the efficiency of the installation must he handled with greater consideration of the requirements of the individual system. 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.