And so he began subscribing to what was known in the 1860s as the “cleanliness and cold water” school of thought, which drew analogies between the tarnishing of silver and the infections caused by bad air. Advocates of this philosophy knew that if a person dipped a spoon in cold water, it would delay the formation of a sulfide coating. Using that same logic, they thought that by boiling water and letting it cool before washing both the instruments and the wound site, a surgeon could prevent postoperative infections from developing. Their emphasis on cold water specifically was meant to
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