The strange story of why human urine was transported to quarries in North East Yorkshire

Since the days of the Roman empire, alum was used as a mordant or fixative that allowed textiles to be colored using vegetable dyes. Initially imported from Italy where there was a Papal monopoly on the industry, the supply to Great Britain was cut off during the Reformation in England. In response to this need, during the 16th century, Thomas Challoner found that fossils in shale along the Yorkshire coast were the same as those found in alum producing areas of Italy and Europe and, as a result, an alum…

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#TodayInHistory – July 26

July 26 – Some important events on this day. 657 👉🏼 Battle of Siffin during the first Muslim civil war between Ali ibn Abi Talib and Muawiyah I beside Euphrates River 1267 👉🏼 Inquisition forms in Rome under Pope Clement IV 1519 👉🏼 Francisco Pizarro receives royal charter for the west coast of South America 1533 👉🏼 Francisco Pizarro orders the death of the last Sapa Inca Emperor, Atahualpa 1579 👉🏼 Admiral and navigator Francis Drake leaves San Francisco to cross Pacific Ocean 1775 👉🏼 U.S. postal system established 1803…

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