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intermediate between two extremely different races or speceies, I can hardly believe. Sir J. Sebright expressly experimentised for this object, and failed. The offspring from the first cross between two pure breeds is tolerably and sometimes (as I have found with pigeons) extremely uniform, and everything seems simple enough; but when these mongrels are crossed one with another for several generations, hardly two of them will be alike, and then the extreme difficulty, or rather utter hopelessness
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itself, and then had given it existence. That most skilful breeder, Sir John Sebright, used to say, with respect to pigeons, that he would produce any given feather in three years, but it would take him six years to obtain head and beak. In Saxony the importance of the principle of selection in regard to merino sheep is so fully recognised, that men follow it as a trade: the sheep are placed on a table and are studied, like a picture by a connoisseur; this is done three times at intervals of
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RODENTS. Rodents, blind, 137. Rudimentary organs, 450. Rudiments important for classification, 416. S. Sageret on grafts, 262. Salmons, males fighting, and hooked jaws of, 88. Salt-water, how far injurious to seeds, 358. Saurophagus sulphuratus, 183. Schiödte on blind insects, 138. Schlegel on snakes, 144. Sea-water, how far injurious to seeds, 358. Sebright, Sir J., on crossed animals, 20. ——, on selection of pigeons, 31. Sedgwick, Prof., on groups of species suddenly appearing, 302
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is destroying all the weak unhealthy – says separately animal good 18 says cannot unite two distinct breeds, has often tried. (N.B. Pigs are exception to this C.D.) [John Saunders Sebright, Bart. 1809. The art of improving the breeds of domestic animals, etc.] 64 Sebright on instinct. Wild Ducks 10 Rabbits so wild 11 Australia Dog always kept aloof from other Dogs – much good on Dogs [John Saunders Sebright, Bart. 1836. Observations upon the instincts of animals.] 67 Smith of Jordon Hill p. 26 On
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The Complete Work of Charles Darwin Online 103 Cervus campestris spotted white when a fawn compare with fallow? deer Moschus c. c. - like young blackbirds Dr Bachman told me that 1/2 Muscovy common duck were often caught wild off coast of America - showing that hybrids can fare for themselves first year the bird fanciers match their birds to see which will sing longest they in evident rivalry sing against each other, till it has been known one has killed itself. Sir J. Sebright has almost lost
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) O 36 Authentic History of Sebright Bantams F [Variation 1: 96: The Sebright bantam, which breeds as true as any other kind of fowl, was formed about sixty years ago by a complicated cross.25 25 'Poultry Chronicle,' vol. ii., 1854, p. 36. ] (Q) 71. Editor All Breeds Q of Fowls occasionally throw white ears-lappets with reference to game, as in Spanish Hamburg how at [illeg] F — [Variation 1: 244: The editor of the 'Poultry Chronicle'32 remarks that all the breeds which properly have red ear
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CUL-DAR85.A33-A37
Abstract:
[Undated]
[Sexual selection — summary and index to many references]
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Sexual Selection Macgillivray Bird 1/570 Magpie getting 3 females another 6 new females B Vol. 5. Sexes alike in Gulls Lestrus, Sterna, Puffin, Razor Bill - Cormorants Gannets, Uria. B p 266 In ♀ Podiceps tuft ruff smaller than in male, so with tuft on Mergansers. Musk til male larger crest. Fine crested wren male heads most crest. The Poultry Book Tegetmeier p. 165 Pheasants selecting particular hen to pair with 139 Comb a fearful vantage to foe B 241. Description of Sebright Bantam Indian
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F1574b
Pamphlet:
de Beer, Gavin ed. 1960. Darwin's notebooks on transmutation of species. Part II. Second notebook [C] (February to July 1838). Bulletin of the British Museum (Natural History). Historical Series 2 (3) (May): 75-118.
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not propagated by nature. Whole art of making varieties may be inferred from facts stated. 134 Shows instinct (Sir J.Sebright admirable essay) hereditary journey wild ducks. lose as well as gain instincts. Wild tame rabbit good instance instincts of many kinds in dogs as clearly applicable to formation of instincts in wild animals many species in one genus external circumstances in both cases effect it. Sir J.Sebright excellent authority because written on dog. Barking applies it to national
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F1574b
Pamphlet:
de Beer, Gavin ed. 1960. Darwin's notebooks on transmutation of species. Part II. Second notebook [C] (February to July 1838). Bulletin of the British Museum (Natural History). Historical Series 2 (3) (May): 75-118.
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cannot be companion but master. Hereditary tameness as well as wildness cf. Sir J. Sebright.5 Love of man gained hereditary, problem solved. Habits become important element in classification because structure has tendency to follow it, or it may be hereditary strictly point out affinities, conduct of Gould,6 166 remark of D'Orbigny7 point out importance of habits in classification. Thought (or desires more properly) being hereditary it is difficult to imagine it anything but structure of brain
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F1574b
Pamphlet:
de Beer, Gavin ed. 1960. Darwin's notebooks on transmutation of species. Part II. Second notebook [C] (February to July 1838). Bulletin of the British Museum (Natural History). Historical Series 2 (3) (May): 75-118.
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structure. the only argument can be a bird practising imperfectly some habit, which the whole rest of other family practise with a peculiar structure, thus Tyrannus sulphureus if compelled solely to fish, structure would alter. It is a difficulty how a different number of vertebrae are produced when ( in all 1 William Yarrell. 2 cf. Variation of Animals and Plants under Domestication, vol. 1, London 1868, p. 68. 3 Wynne. Unidentified. 4 Sir John Sebright, cf. Variation of Animals and Plants under
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F1574c
Pamphlet:
de Beer, Gavin ed. 1960. Darwin's notebooks on transmutation of species. Part III. Third notebook [D] (July 15 to October 2nd 1838). Bulletin of the British Museum (Natural History). Historical Series 2 (4) (July):119-150.
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William Sharp Macleay. Annulosa in A. Smith: Illustrations of the Zoology of South Africa, London 1838, p. 8, footnote, (cf. footnote to MS. p. 52 above.) 5 William Yarrell. Personal communication. 6 Sir John Sebright. Probably personal communication. [page] 14
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F1574c
Pamphlet:
de Beer, Gavin ed. 1960. Darwin's notebooks on transmutation of species. Part III. Third notebook [D] (July 15 to October 2nd 1838). Bulletin of the British Museum (Natural History). Historical Series 2 (4) (July):119-150.
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) that one copulation with other dogs renders subsequent progeny faulty. Does male fail in passion. Disposition of half bred cattle at Combermere? How is jackall dog of Z. Gardens. 1 Sir John Sebright. Reference untraced. 2 Col. William Henry Sykes. Reference untraced. 3 Collection des Suites Buff on, formant avec les oeuvres de cet auteur un cours compl t d'Histoire Naturelle, Paris 1834 (or other edition). 4William Youatt. The Horse, with Treatise on Draught , Library of Useful Knowledge, Farm
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F1574e
Pamphlet:
de Beer, Gavin, Rowlands, M. J. eds. 1961. Darwin's notebooks on transmutation of species. Addenda and corrigenda. Bulletin of the British Museum (Natural History). Historical Series 2 (6) (October) 185-200.
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of Birds, London 1814, vol. 1, p. 72; Goldfinches are put in small cages, with wooden backs, and placed near to, but so that they cannot see, each other; they will then raise their shrill voices, and continue their vocal contest till one frequently drops off its perch, perfectly exhausted 7 Sir John Sebright. 8 William Yarrell. Personal communication. 9 A line is drawn across the page with the figure 2 in a circle, to the right of which is the figure 12 in pencil. 10 William Yarrell. Personal
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, Joseph Paul. 1830-4. Zoologie. 4 vols., in Dumont d'Urville, Jules Sébastien César, Voyage de la corvette L'Astrolabe. 12 vols. Paris. 1830-5. [Saint Pierre, Jacques Henri Bernadin de]. 1773. Voyage à I'Isle de France, à I'Isle de Bourbon. 2 vols. Neuchâtel. [? ed.] Sebright, John Saunders. 1809. The art of improving the breeds of domestic animals. In a letter addressed to the Right Hon. Sir Joseph Banks. London. [Darwin Pamphlet Collection in CUL.] Sebright, John Saunders. 1836. Observations
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intellect—hopes, which as they cannot be gratified here, belong to a frame of mind suited to a nobler state of existence. 63 March 16th. — Is not that kind of memory, which makes you do a thing properly, even when you cannot remember it, as my father trying to remember the man's Christian name,1 writing for the surname, analogous to instinctive memory, consequently instinctive action. — Sir. J. Sebright,2 has given the phrase heredetary habits . very clearly, all I must do is to generalize it
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F1582
Book contribution:
Barrett, P. H. 1974. Early writings of Charles Darwin. In Gruber, H. E., Darwin on man. A psychological study of scientific creativity; together with Darwin's early and unpublished notebooks. Transcribed and annotated by Paul H. Barrett, commentary by Howard E. Gruber. Foreword by Jean Piaget. London: Wildwood House. [Notebooks M, N, Old and useless notes, Essay on theology and natural selection, Questions for Mr. Wynn, Extracts from B-C-D-E transmutation notebooks, A Biographical Sketch of Charles Darwin's Father, Plinian Society Minutes Book]
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. 186. Sebright, John, Observations upon the Instinct of Animals, Gossling Egley, London (pamphlet), 1836, 16 pp., pp. 15 16: No one can suppose that nature has given to these several varieties of the same species such very different instinctive propensities, and that each of these breeds should possess those that are best fitted for the uses to which they are respectively applied. It seems more probable that these breeds having been long treated as they now are, and applied to the same uses
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grant that difficult other go back to either parent. — 1 Sir John Sebright. Observations upon the instinct of Animals, London 1836. [According to D. Kohn this is actually a reference to Sebright. 1809. The Art of Improving the Breeds of Domestic Animals. London] 2 J. Wilkinson. Remarks addressed to Sir J. Sebright , London 1820. 13
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Shows instinct (Sir J.Sebright admirable essay) hereditary journey wild ducks. — lose as well as gain instincts. Wild tame rabbit good instance—instincts of many kinds in dogs as clearly applicable to formation of instincts in wild animals many species in one genus external circumstances in both cases effect it. — Sir J.Sebright excellent authority because written on dog. Barking—applies it to national character. — 13
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The attachment of dogs to man not altogether explained by F. Cuvier,1 Mem. Hensleigh's2 objection. — it is more, he cuts the matter short by saying man cannot be companion but master. — hereditary tameness as well as wildness — cf Sir J. Sebright.3 — Love of man gained hereditary, problem solved. habits become important element in classification because structure has tendency to follow it, or it may be hereditary strictly point out affinities, conduct of Gould,4 remark of D'Orbigny5 point out
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first got5 point on hackles on Bantams by crossing with common Polish cock is not that old variety then recrossing offspring till size diminished, but feathers continued by picking chicken of each brood. — These bantam feathers 1 William Yarrell. 2 cf. Variation of Animals and Plants under Domestication, vol. 1, London 1868, p. 68. 3 Wynne. Unidentified. 4 Sir John Sebright, cf. Variation of Animals and Plants under Domestication, vol. 2, London 1868, p. 197. 5 A small drawing at this place in MS
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Cervus Campestris spotted white when a fawn compare with fallow? deer. Moschus c — like young blackbirds Dr Bachman told me that 1/2 Muscovy common duck were often caught wild off coast of America.— showing hybrids can fare for themselves. + + first year. — The bird fanciers match their birds to see which will sing longest, they in evident rivalry sing against each other, till it has been known one has killed itself. — Sir. J. Sebright — has almost lost his Owl-Pidgeons from infertility
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from long permanence, so that all their peculiarities must be transmitted if their 1 William Yarrell. Personal communication. 2 Sir John Sebright. Probably personal communication. 109e-110e [not found] 11
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Sir John Sebright. Reference untraced. 5 Col. William Henry Sykes. Reference untraced. 18
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Wm Yarrell (1) About non-breeding of animals in confinement, curious. — foxes — English animals. (Made no import. remark) (2) Secondary male characters. — does male transmit to male more of his features — in negro white (3) About the Bantams at Zoolog Soc. — did Sir. J. Sebright select to destroy secondary character believe no or did result appear without his wish [in margin:] Has since recrossed this breed. — Have secondary male characters appeared. — (4) Does he know any seed-raisers (5
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F1556
Book:
Darwin, Francis ed. 1909. The foundations of The origin of species. Two essays written in 1842 and 1844. Cambridge: University Press.
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of selection have been methodically followed for scarcely a century; but their high importance is shown by the practical results, and is admitted in the writings of the most celebrated agriculturalists and horticulturalists;—I need only name Anderson, Marshall, Bakewell, Coke, Western, Sebright and Knight. Even in well-established breeds the individuals of which to an unpractised eye would appear absolutely similar, which would give, it might have been thought, no scope to selection, the whole
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Nr 7 day old Cochin China 5. July 29 6: Call Duck 7 day old Sebright Bantam Gold Spangled gives Sir J. having 7 Call Duck Aug 22d. 8 Dorking of very best breed: Sept 24 9. Spanish Chicken. 7 days old. from H. Hemmings. Throat yellow. Bill black. Legs greenish. feathers black with yellowish tinge below. a line below the figure 9. according to Tegetmeier this is a Minorca not true Spanish. Yet so, like will, I think do. Oct 7./ 10 Barb. 10 days old. Oct 10th/ nor 11 Swallow. 7 days old
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CUL-DAR8.(1-102)
Draft:
1856
'Natural selection' chapter 3 (On the possibility of all organic beings occasionally crossing and on the remarkable susceptibility of the reproductive system to external agencies)
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(Ch. 3. ill effects of breeding in in) The evidence of an acute man observer like Sir John Sebright, who bred all sorts of animals during his whole life, who said boasted that he could produce any form feather in years any fer form in years; who always worked by crossing thereby closely interbreeding, is very good; he was a most firm believer ( ) in the ill effects of this process carried on too long. I was assured by Mr Yarrell that Sir John had for so long interbred his Owl-Pigeons, that
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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, from being very unwilling to cross his breed, he almost lost them, so infertile had they become, until he was obliged to resort to a cross when his breed became fertile./ 2 bis/The evidence of an acute observer like Sir John Sebright, who bred all sorts of animals during his whole life, who boasted that he could produce any feather in [three] years any form in [six] years;3 who always worked by crossing thereby closely interbreeding, is very good; he was a most firm believer4 in the ill effects
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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, so seldom requiring to be taught not to worry sheep or poultry; yet every wild canine animal would at once attack/43/them. This was the case with a native dog from Australia, whelped on board a ship, which Sir J. Sebright tried for a year to tame, but which if led near sheep or poultry became quite furious ; so again Captain Fitz-Roy3 says that not one of the many dogs, procured from the natives of Tierra del Fuego Patagonia, which were brought to England could easily be prevented from
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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Description of the Scottish Forests; Legends; Superstitions; Stories; of Poachers and Freebooters, c. c. 2nd ed. London, 1839. III, 4. IV, 42. x, 49, 110. Days and Nights of Salmon Fishing in the Tweed; with a short account of the Natural History and Habits of the Salmon, instructions to sportsmen, anecdotes, etc. London: Murray, 1843. x, 54. Sebright, Sir John Saunders. [The Art of Improving the Breeds of Domestic Animals. In a letter addressed to the Right Hon. Sir Joseph Banks, K.B. London, 1809
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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, that is with the amount of resemblance which can anyhow 1 W. Youatt. Cattle 1834. p 202. 2 in his well known Remarks addressed to Sir J. Sebright 1820. p. 38. [page] 444 HYBRIDIS
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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Scrope, William Crossed dogs with mixed instincts, 490 n 2 Deer: Expel wounded when pursued by dogs, 524 n 2; Size reduced by interbreeding, 37 n 5; Varieties of Red, 117 n 3 Migratory direction-finding in salmon, 493 n 1 Scrophulariaceae: Dichogamy, 47; Irregular flowers need longer development, 303; Varieties in large and small genera, 153 table Sebright, Sir John Dogs: Different mode of hunting in hounds and harriers, 485 n 1; Instinctive love of man, 489; Native cannot learn to leave sheep
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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; on the same principle that the horns of deer are affected by emasculation, by the amount of food,/72/or by unnatural conditions as confinement on shipboard;/72 v/and I think this explanation may be true to a large extent. We must, however, be cautious in inferring loss of virile powers from loss of the secondary male characters; to give one instance; Sebright Bantam has not sickle-feathers in the tail, yet a writer in Poultry Chronicle, shows that one thus deficient, was the father of an
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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great difference in size between two varieties be strictly considered as causing lessened fertility. Thus it is well known that bitches paired with dogs of large size, often die during parturition. I presume very unequal size would sometimes interfere with the union of varieties; though A. Knight got offspring from a Dray stallion Norwegian Pony1 chickens from a Cochin cock Sebright Bantam Hen were exhibited at Manchester2 /102/When we hear that certain domestic breeds of native American dogs3
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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have given details in a former chapter,3 showing that during at least the last 250 years these birds have been known to tumble on the ground, after being slightly shaken, to continue tumbling until taken up blown on. As this breed has gone on so long, the habit can hardly be called a disease. 1 Sir J. Sebright on Instinct p. 18 2 Molina Hist. Nat. Chile vol. I p. 302. [Actually p. 368.] Dobrizhoffer Account of the Abipones vol I p. 225, See Rollin, [Roulin] Mem. divers Savans c Tom rv. [vi] p 387
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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as Sir J. Sebright has remarked, they appear to inherit an instinctive love of man. I could give several instances of partially or wholly lost instincts. Two examples will suffice: Chinese Polynesian dogs, though so strictly carnivorous animals, from having been for many generations fed-on vegetable food, have lost their' instinctive taste for flesh.1 Considering the general habits of Birds, it must be, as Paley has remarked, a most strong impulse which leads a bird to sit so closely on her
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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Wight, Robert. 'Statistical Observations on the Vurragherries, or Pulney Mountains.' Madras J. Lit. Sci., 5 (1837), 280-9. xI, 18. Wilcke, H. C. D. See Linn . Wilkinson, John. Remarks on the Improvement of Cattle, etc., in a Letter to Sir John Sounders Sebright.. .Nottingham, 1820. Ix, 104. [Not seen. The only listing found for this is in the Rothamsted Experimental Station, Harpenden, Library Catalogue of Printed Books and Pamphlets on Agriculture published between 1471 and 1840, compiled by
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F1583
Book:
Stauffer, R. C. ed. 1975. Charles Darwin's Natural Selection; being the second part of his big species book written from 1856 to 1858. Cambridge: Cambridge University Press.
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Hewitt, Edward (cont.) silver pheasant, 429; Gold x silver pheasant, 435 n 4; Unsuccessful -common hen x silver or gold pheasant, 435 n 3; Pheasant x (fowl x pheasant), 435 n Pheasant prefers own species after habitation with common fowl, 428 n 3 Prepotency: Fowl x pheasant, 457 n 1, 458; Wild disposition over domestic, 486 Secondary sexual characters and virile force deficient: in Sebright bantams, 316 n 1; pheasant hybrids, 429, 452 Sterility of hybrid Gallinaceae trom aborted embryos, 422
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productions and agriculture; mines and metallurgy; inhabitants, history, and other features, of America; particularly of Chile, and Arauco. London. Sebright, John Saunders. 1809. The art of improving the breeds of domestic animals. In a letter addressed to the Right Hon. Sir Joseph Banks. London. [Darwin Pamphlet Collection in CUL.] Sebright, John Saunders. 1836. Observations upon the instinct of animals. London. [Darwin Pamphlet Collection in CUL.] Smith, Charles Hamilton. 1839-40. The natural
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States Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842. 5 vols. Philadelphia. [Abstract in CUL-DAR205.4.37.] Wilkinson, John. 1820. Remarks on the improvement of cattle, c. in a letter to Sir John Saunders Sebright, Bart. M.D. 3d ed. Nottingham. [Darwin Pamphlet Collection in CUL.] Woodard, David. 1804. The narrative of Captain David Woodard and four seamen, who lost their ship and surrendered themselves up to the Malays, in the Island of Celebes. Together with narratives of
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F373
Book:
Darwin, C. R. 1859. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 1st ed., 1st issue.
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intermediate between two extremely different races or speceies, I can hardly believe. Sir J. Sebright expressly experimentised for this object, and failed. The offspring from the first cross between two pure breeds is tolerably and sometimes (as I have found with pigeons) extremely uniform, and everything seems simple enough; but when these mongrels are crossed one with another for several generations, hardly two of them will be alike, and then the extreme difficulty, or rather utter hopelessness
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F373
Book:
Darwin, C. R. 1859. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 1st ed., 1st issue.
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itself, and then had given it existence. That most skilful breeder, Sir John Sebright, used to say, with respect to pigeons, that he would produce any given feather in three years, but it would take him six years to obtain head and beak. In Saxony the importance of the principle of selection in regard to merino sheep is so fully recognised, that men follow it as a trade: the sheep are placed on a table and are studied, like a picture by a connoisseur; this is done three times at intervals of
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F373
Book:
Darwin, C. R. 1859. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 1st ed., 1st issue.
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RODENTS. Rodents, blind, 137. Rudimentary organs, 450. Rudiments important for classification, 416. S. Sageret on grafts, 262. Salmons, males fighting, and hooked jaws of, 88. Salt-water, how far injurious to seeds, 358. Saurophagus sulphuratus, 183. Schiödte on blind insects, 138. Schlegel on snakes, 144. Sea-water, how far injurious to seeds, 358. Sebright, Sir J., on crossed animals, 20. ——, on selection of pigeons, 31. Sedgwick, Prof., on groups of species suddenly appearing, 302
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F2056.1
Book:
Darwin, C. R. 1860. Het ontstaan der soorten van dieren en planten door middel van de natuurkeus, of het bewaard blijven van bevoorregte rassen in de strijd des levens. With a preface and an epilogue by the translator Tiberius Cornelius Winkler. 1st ed. Haarlem: A. C. Kruseman, 2 vols. vol. 1.
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OVER DE RASSEN DER TAMME DUIF. 31 of soorten, is iets wat mij ongeloofelijk voorkomt. J. SEBRIGHT nam juist in dezen zin eene menigte proeven, maar allen mislukten. De jongen van de eerste kruising tusschen twee zuivere rassen zijn vrij gelijk aan de ouden, wat mij vooral bij duiven gebleken is, en de proef schijnt wel te gelukken; maar wanneer die jongen onderling gedurende eenige generatiën gekruist worden, zullen er naauwelijks twee individuen op elkander gelijken, en het wordt duidelijk
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F376
Book:
Darwin, C. R. 1860. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 2d ed., second issue.
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occasional crosses, if aided by the careful selection of those individual mongrels, which present any desired character; but that a race could be obtained nearly intermediate between two extremely different races or species, I can hardly believe. Sir J. Sebright expressly experimentised for this object, and failed. The offspring from the first cross between two pure breeds is tolerably and sometimes (as I have found with pigeons) extremely uniform, and everything seems simple enough; but when these
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F376
Book:
Darwin, C. R. 1860. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 2d ed., second issue.
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itself, and then had given it existence. That most skilful breeder, Sir John Sebright, used to say, with respect to pigeons, that he would produce any given feather in three years, but it would take him six years to obtain head and beak. In Saxony the importance of the principle of selection in regard to merino sheep is so fully recognised, that men follow it as a trade: the sheep are placed on a table and are studied, like a picture by a connoisseur; this is done three times at intervals of months
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F2056.1
Book:
Darwin, C. R. 1860. Het ontstaan der soorten van dieren en planten door middel van de natuurkeus, of het bewaard blijven van bevoorregte rassen in de strijd des levens. With a preface and an epilogue by the translator Tiberius Cornelius Winkler. 1st ed. Haarlem: A. C. Kruseman, 2 vols. vol. 1.
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: het schijnt als of zij eerst eene gedaante gevormd en die vervolgens levend gemaakt hebben. Sir JOHN SEBRIGHT was gewoon te zeggen, sprekende over duiven, dat hij eene vooraf bepaalde kleur in drie jaren kon voortbrengen, maar dat hij zes jaren noodig had om een kop en een bek te vormen. In Saksen stelt men zooveel belang in het doen van eene goede keus ten opzigte van de merinoschapen, dat men er zelfs eene soort van handwerk van maakt: de schapen worden op eene tafel geplaatst en bekeken zooals
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F376
Book:
Darwin, C. R. 1860. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. 2d ed., second issue.
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RODENTS. STRIPES. Rodents, blind, 137. Rudimentary organs, 450. Rudiments important for classification, 416. S. Sagaret on grafts, 262. Salmons, males fighting, and hooked jaws of, 88. Salt-water, how far injurious to seeds, 358. Saurophagus sulphuratus, 183. Schiödte on blind insects, 138. Schlegel on snakes, 144. Sea-water, how far injurious to seeds, 358. Sebright, Sir J., on crossed animals, 20. ——, on selection of pigeons, 31. Sedgwick, Prof., on groups of species suddenly appearing, 302
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F380
Book:
Darwin, C. R. 1860. The origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. New York: D. Appleton. New edition, revised and augmented.
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the Italian greyhound, bloodhound, bull-dog, c., in the wild state. Moreover, the possibility of making distinct races by crossing has been greatly exaggerated. There can be no doubt that a race may be modified by occasional crosses, if aided by the careful selection of those individual mongrels, which present any desired character; but that a race could be obtained nearly intermediate between two extremely different races or species, I can hardly believe. Sir J. Sebright expressly experimentised
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| 30% |
F380
Book:
Darwin, C. R. 1860. The origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. New York: D. Appleton. New edition, revised and augmented.
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existence. That most skilful breeder, Sir John Sebright, used to say, with respect to pigeons, that he would produce any given feather in three years, but it would take him six years to [page] 3
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