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Old December 4th, 2017, 06:10 PM   #1

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Puzzling concept - sweating marble


I have been leisurely reading through James A. Maruseks' Chronological Listing of Early Weather Events on the web at http://www.breadandbutterscience.com/Weather.pdf

I've found a lot of interesting and striking things there, but relatively early are accounts of 'sweating marble and plaster' in 1021 or 1022

1022 A.D. In 1021 or 1022 in England, there was excessive heat, “yet marbles sweat profusely.” 47 , 72

In 1021 there was an excessive hot droughty summer in England. The French and Germans place this heat wave in 1022 and say that so great a drought and heat arose that many people and cattle died of it. In this heat, marble pillars sent forth so profuse a sweat. 72

If I'm reading the sources correctly,
The source for 47 is:
(Royal) Journal of the Statistical Society, Volume XL I – Year 1878, London, Edward Stanford, 1878

The source for 72 is:
Thomas Short , A General Chronological History of Air , Weather, Seasons, Meteors in Sultry Places and different Times, London, Volumes 1 & 2, 1749.

I'd never come across anything like this before, and it caught my imagination. I have a vague memory of seeing something along these lines earlier in antiquity on this same website, but have forgotten when.

Looking it up on the internet has giving me nothing at all useful.

Has anyone else seen accounts of 'sweating marble' and how do you suppose it comes about?

Last edited by Stephie; December 4th, 2017 at 06:26 PM. Reason: poor grammar
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Old December 5th, 2017, 04:44 AM   #2

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Here is a similar phenomenon described, but not in hot wrather. I suspect that the marble had taken up water previously, and when heated, especially in humid conditions, could produce "sweat".

https://books.google.com/books?id=hu...0water&f=false
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Old December 5th, 2017, 06:12 AM   #3

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In hot weather, you can touch the tank of a toilet and feel moisture, which is the result of the cold water inside and the moisture from the air outside condensing. The marble, like glass, would get colder at night than other materials such as wood, and this would probably result in condensation when the hot day came.
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Old December 5th, 2017, 11:34 AM   #4
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As Jake said. It probably has to do with condensation. Depends on the moisture. Water will settle on objects with temperature lower than dew point. Concrete sweats too.
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