VRIES, Hugo de (1848-1935). Die Mutationstheorie . Leipzig: Veit & Comp., 1901-1903. 2 volumes in 6 parts. 4 o (246 x 172 mm). Numerous text illustrations, 12 chromolithographed plates. Original green printed wrappers, uncut (spines faded, repairs to spines, some light foxing); modern cloth case. FIRST EDITION. De Vries began an intensive study of Oenothera lamarckiana , a species of evening primrose, in 1886, after noticing a number of variants of the species. During his studies new forms appeared, and de Vries was able to formulate his Laws of Mutation, suggesting that new species developed through a series of small, random, and not necessarily useful changes ("mutations" or "saltations"). His theory buttressed Darwin's evolutionism and explained the progress of changing characteristics within species. "Although his Oe. lamarckiana mutants were later discredited (the plant was shown to be a permanent hybrid), the principle of mutation, or sudden change in species, remains a cornerstone of evolution theory" (Norman). VERY RARE IN THE ORIGINAL FASCICULES. Dibner Heralds of Science 36; Garrison-Morton 240; Horblit 73b; Norman 2169. (6)
VRIES, Hugo de (1848-1935). Die Mutationstheorie . Leipzig: Veit & Comp., 1901-1903. 2 volumes in 6 parts. 4 o (246 x 172 mm). Numerous text illustrations, 12 chromolithographed plates. Original green printed wrappers, uncut (spines faded, repairs to spines, some light foxing); modern cloth case. FIRST EDITION. De Vries began an intensive study of Oenothera lamarckiana , a species of evening primrose, in 1886, after noticing a number of variants of the species. During his studies new forms appeared, and de Vries was able to formulate his Laws of Mutation, suggesting that new species developed through a series of small, random, and not necessarily useful changes ("mutations" or "saltations"). His theory buttressed Darwin's evolutionism and explained the progress of changing characteristics within species. "Although his Oe. lamarckiana mutants were later discredited (the plant was shown to be a permanent hybrid), the principle of mutation, or sudden change in species, remains a cornerstone of evolution theory" (Norman). VERY RARE IN THE ORIGINAL FASCICULES. Dibner Heralds of Science 36; Garrison-Morton 240; Horblit 73b; Norman 2169. (6)
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