Abstract
As this subject has been under discussion lately in NATURE, it seems worth while recording a striking instance which must be well known to many who have been in the large mess room of the Royal Engineers at Chatham. This room has a lofty, highly ornamented ceiling, which was for many years bordered with a deep cornice with a plain moulding either in plaster or papier maché, mostly stuck on one simple template, and coloured either white or some very pale tint. The room was lit by three sunlights in the roof, containing about 190 gas jets. In the course of time the whole of the white moulded cornice became grey with soot-deposit marked at intervals with light bars, which were apparently the outline of the wooden ribs carrying the mouldings. This pattern was fairly conspicuous, and was often a subject of discussion at mess (1885 to 1890). Dr. A. Lodge's explanation of the cause seems to be the true explanation.
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CUNNINGHAM, A. Soot-figures on Ceilings. Nature 48, 29 (1893). https://doi.org/10.1038/048029e0
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DOI: https://doi.org/10.1038/048029e0
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