EditorialJen Psaki, President Joe Biden’s press secretary, fields questions at the White House in Washington, Sept. 10, 2021. (Peter van Agtmael/The New York Times)
EditorialExtraction of vitriol in winter, In winter, vitriol water is first cooked in pans and filled into containers with a grid of laces on which pieces of vitriol stick, woodcut, p. 462, (Liber duodecimus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georg...
EditorialExtraction of vitriol from soil_2, Pieces of vitriol earth are dissolved in water, then the solution is boiled, the precipitated vitriol is made liquid and filled into pots, woodcut, p. 464, (Liber duodecimus), Manuel, Hans Rudolf (graveur sur bois), 1...
EditorialExtraction of vitriol from soil_1, The earth is dissolved in water and copper settles on the ground., The solution is then boiled, woodcut, p. 463, (Liber duodecimus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica lib...
EditorialProduction of vitriol, Vitriol water is condensed in the earth recessed containers from the warmth of the sun, woodcut, p. 461, (Liber duodecimus), Manuel, Hans Rudolf (graveur sur bois), 1556, Georgius Agricola: De re metallica libri XII: quibus offic...