JEAN REY'S “Essais sur la recherche de la cause par la quelle 1'estain et le plomb augmentent de poids, quand on les calcine” have been familiar to English readers for some years past ...

In a new edition of the “Essais de Jean Rey”, reviewed in NATURE of July 9, an attempt is made to assign this discovery to Rey, and, so far to regard Torricelli, Galileo, Pascal, and Descartes ...