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Anderson, E. A., & Ketch, J. M. (1924). Depreciation of lighting equipment due to dust and dirt. Transactions of Illuminatin Engineering Society, 55–65. 
Added by: Sarina (2008-12-22 10:13:16)   
Resource type: Journal Article
BibTeX citation key: Anderson1924
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 Categories: Englisch = English
Keywords: Lampen = Lamps
Creators: Anderson, Ketch
Collection: Transactions of Illuminatin Engineering Society		 Views: 4/1021
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Abstract
A report of tests under service conditions to determine the relative depreciation or loss in efficiency of lighting equipments due to the accumulation of dust and dirt. Comparison tests were made under forced rates of dirt accumulation in an effort to determine the feasibility of obtaining quick comparisons between the depreciation rates of different equipments. Consideration of the possibilities of a simple comparison standard for predicting depreciation rates in a particular installation is included.
Added by: Sarina  Last edited by: Sarina
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