The "Disease" That Struck Medieval Church Organs

During long, cold winters in medieval Europe, church organs grew gray, sickly-looking circles that spread over their pipes. People back then believed that this was the work of the devil, but as it turns out, it’s just some pretty simple chemistry.

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Sources:
https://books.google.com/books?id=7oV1Ujmiy-wC&pg=PA10&lpg=PA10#v=onepage&q&f=false
https://www.hotwires.net/tin-pest-a-forgotten-issue-in-pb-free-assembly/
https://link.springer.com/article/10.1007%2Fs10853-006-2896-0
https://www.cambridge.org/core/journals/mrs-bulletin/article/music-and-materials-art-and-science-of-organ-pipe-metal/C0E06E407F98D230290D4F7967422D28
http://physicsbuzz.physicscentral.com/2015/07/allotropy-why-winter-spells-trouble-for.html
https://calce.umd.edu/tin-pests
https://www.indium.com/blog/tin-pest-still-a-forgotten-concern-in-lead-free-assembly.php
https://www.asminternational.org/documents/10192/1895960/amp16702p81.pdf/4dd80ec4-657d-4f41-ab0b-37aaf035038a
http://przyrbwn.icm.edu.pl/APP/PDF/135/app135z5p22.pdf
https://books.google.com/books?id=DyrohYlFCiYC&pg=PA199&lpg=PA199#v=onepage&q&f=false
https://books.google.com/books?id=MDMMd9EaVjcC&pg=PA317&lpg=PA317#v=onepage&q&f=false
https://link.springer.com/article/10.1007/s11668-010-9391-2
https://mientrasenfisicas.wordpress.com/2019/11/16/puede-un-metal-sufrir-una-enfermedad/amp/?__twitter_impression=true
http://eprintspublications.npl.co.uk/4698/1/MAT21.pdf

Image Sources:
https://freesound.org/people/Samulis/sounds/373695/
https://commons.wikimedia.org/w/index.php?sort=relevance&search=tin+pest&title=Special:Search&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns0=1&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1#/media/File:PSM_V83_D032_Organ_pipes_that_have_been_attacked_by_tin_disease.png
https://www.flickr.com/photos/pedrosimoes7/40600263973/in/photolist-24RGXZg-ttC283-2gtA18T-2gtA1A1-2grjhP8-2grj2FG-2gtzZaL-2grjh4L-XY6JbE-2gtzZtg-2gtAiY3-2gusP1G-2gusomA-W61rLT-2grjhnr-C9PYij-4eBMdi-C9PXLh-W7ehMM-2gusPtA-2grjPD9-2gtzZKZ-8AEvW1-9kiT97-2grj4f3-jufmiR-7QLMiU-7QLKyf-7QHuYg-in3UYz-re23PF-7MH6zG-7QLJVq-7MD6wc-7QLFp7-7MH74w-stAkB8-scaz7i-5UtKa3-Suuxdb-SuuwgG-7QLLkq-7QLHkj-v3UU16-7QHp1H-7QHqXp-2T452S-SxdeQt-ogvJ5h-bpGecr
https://www.istockphoto.com/photo/metallic-surface-gm183764196-15338332
https://en.wikipedia.org/wiki/Tin#/media/File:Tetragonal-body-centered.svg
https://en.wikipedia.org/wiki/Tin#/media/File:Diamond_cubic_crystal_structure.svg
https://www.istockphoto.com/photo/round-cut-diamond-on-gray-glossy-background-gm1097492852-294722392https://www.istockphoto.com/photo/church-organ-pipes-detail-gm887471300-246303047
https://commons.wikimedia.org/w/index.php?sort=relevance&search=tin+pest&title=Special:Search&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns0=1&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1#/media/File:PSM_V83_D033_The_spread_of_tin_disease_in_a_sheet_of_tin.png
https://www.istockphoto.com/photo/macro-pencil-graphite-gm955495712-260879839