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On the Tendency of Varieties to Depart Indefinitely From the Original Type (1858) By Alfred Russel Wallace. Transcribed and Edited by Charles H. Smith, Ph.D. This is the famous “Ternate essay” introducing natural selection that Wallace sent to Charles Darwin in early 1858.
II On the Tendency of Varieties to depart indefinitely from the Original Type; III Mimicry, and other Protective Resemblances among Animals; IV The Malayan Papilionidœ, or Swallow-tailed Butterflies, as illustrative of the Theory of Natural Selection; V On Instinct in Man and Animals; VI The Philosophy of Birds' Nests
Wallace wrote his paper On The Tendency of Varieties to Depart Indefinitely from the Original Type at Ternate in February 1858 and sent it to Darwin with a request to send it on to Lyell. Darwin received it on 18 June 1858, [3] and wrote to Lyell that "your words have come true with a vengeance,... forestalled" and "If Wallace had my ...
Estando en Ternate, escribió "On the tendency of varieties to depart indefinitely from the original type", una descripción brillante, clara y concisa sobre el origen y posterior divergencia de las especies, que envió a Darwin para obtener su opinión.
Darwin, C. R. 1858. II. Abstract of a letter from C. Darwin, Esq., to Prof. Asa Gray, Boston, U.S., dated Down, September 5th, 1857. pp. 50-53. In: Darwin, C. R. & Wallace, A. R. On the tendency of species to form varieties; and on the perpetuation of varieties and species by natural means of selection.
On the Tendency of Varieties to Depart Indefinitely from the Original Type. Alfred Russel Wallace. One of the strongest arguments which have been adduced to prove the original and permanent distinctness of species is, that varieties produced in a state of domesticity are more or less unstable, and often have a tendency, if left to themselves ...
On the Tendency of Varieties to Depart Indefinitely from the Original Type. The Struggle for Existence. The life of wild animals is a struggle for existence. The full...
