Book Reviews his eighties. In 1835, he married and settled in Paris as a teacher at the Conservatoire des Arts et Metiers, while conducting agricultural experiments with his brother-in-law on an estate in the Alsace, which was sustained economically by revenues from oil-bearing sands. Although McCosh's account of the collaboration with Dumas and the fat controversy with Liebig does not replace that given by F.L. Holmes in his study of Bernard and animal chemistry, he provides a good account of

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... oussingault's single-minded devotion to unravelling the nitrogen cycle. The book is marred by copious misprints, but is otherwise an exemplary biography.