In the June issue of the Journal this stamp was inadvertently published with the wrong vignette. Here it appears again with the correct one.

Jean Baptiste van Helmont was the founder of the latrochemical School, which looked to chemical explanations of vital phenomena. He was a man of great intellectual curiosity, who studied philosophy at Louvain. Disappointed with the content of the study he turned to law and after further disappointment decided to study medicine.

 Van …