Self-promotion alert! (But if I don't tell you, who will?) I'm happy to say that a piece I wrote on two seventeenth-century scientific projectors, Gabriel Plattes (c.1600-44) and William Petty (1623-87), has at long last come out as a chapter in the large volume shown at left. My contribution looks at how Plattes and Petty … Continue reading New publication: Alchemical transmutation and economic value in the seventeenth century