A hundred years after his death, a statue of Lavoisier was erected in Paris and much admired until someone pointed out that it looked nothing like him. Under questioning the sculptor admitted that he had used the head of the mathematician and philosopher the Marquis de Condorcet--apparently he had a spare--in the hope that no one would notice or, having noticed, would care. In the second regard he was correct. The statue of Lavoisier-cum- Condorcet was allowed to remain in place for another half century until the Second World War when, one morning, it was taken away and melted down for scrap.