VRIES, H. DE — Die Mutationstheorie.

Leipzig, Veit, 1901. - 1903. In 2 vols. W. 12 col. pls. and numer. ills. Contemp. half mor., spine gilt. (Some rubb.). DSB vol. XIV, pp. 95 - 105: '... in which he described in detail his work on the segregation laws, on phenomena of variation, and on plant mutations. The book made him famous, and he was recognized as one of the foremost botanists of his time.': G&M, 240: Horblit, Grolier, 73b: 'De Vries discovered, revealed and proved the importance of Mendel's work. Advanced the theory of 'Mutation' or discontinuous change in the character of species.': Heirs of Hippocrates, 1094: '... de Vries, definitive treatise on mutation.': Dibner, 36: 'Studying the evening primrose, he recognized the sudden appearance of a new species. A true and measurable mutation was observed.': Norman Coll. 2169: First edition.