Cologne, Düsseldorf, Elberfeld, Essen, and other great industrial centres of Western Germany will next year be celebrating the centenary of their Prussian connection.

CHEVREUL, MICHEL EUGÈNE, a French chemist, born at Angers; an expert in the department of dyeing, and an authority on colours, as well as the chemistry of fats; was director in the dyeing department in the Gobelins manufactory; he lived to witness the centenary of his birth (1786-1889).