The Variation of Animals and Plants under Domestication

Preface to the Second Edition

During the seven years which have elapsed since the publication in 1868 of the first edition of this Work, I have continued to attend to the same subjects, as far as lay in my power; and I have thus accumulated a large body of additional facts, chiefly through the kindness of many correspondents. Of these facts I have been able here to use only those which seemed to me the more important. I have omitted some statements, and corrected some errors, the discovery of which I owe to my reviewers. Many additional references have been given. The eleventh chapter, and that on Pangenesis, are those which have been most altered, parts having been remodelled; but I will give a list of the more important alterations for the sake of those who may possess the first edition of this book.

TABLE OF PRINCIPAL ADDITIONS AND CORRECTIONS IN SECOND EDITION

First Edition Vol. I	Second Edition Vol. I
Page	Chapter
34	I	Dr. Burt Wilder’s observations on the brains of different breeds of the Dog.
38	I	Degeneracy of Dogs imported into Guinea.
51	II	Difference in the number of lumbar vertebræ in the races or species of the Horse.
102	III	Hairy appendages to the throats of Goats.
162	V	Sexual differences in colour in the domestic Pigeon.
217	VI	Movements like those of the Tumbler-pigeon, caused by injury to the brain.
290	VIII	Additional facts with respect to the Black-shouldered Peacock.
296	VIII	Ancient selection of Gold-fish in China.
314	IX	Major Hallett’s ‘Pedigree Wheat.’
326	IX	The common radish descended from Raphanus raphanistrum.
374	XI	Several additional cases of bud-variation given.
396	XI	An abstract of all the cases recently published of graft-hybrids in the potato, together with a general summary on graft-hybridisation.
399	XI	An erroneous statement with respect to the pollen of the date-palm affecting the fruit of the Chamærops omitted.
400	XI	New cases of the direct action of pollen on the mother-plant.
404	XI	Additional and remarkable instances of the actions of the male parent on the future progeny of the female.
Vol.II
14	XII	An erroneous statement corrected, with respect to the regrowth of supernumerary digits after amputation.
23	XII	Additional facts with respect to the inherited effects of circumcision.
23	XII	Dr. Brown-Séquard on the inherited effects of operations on the Guinea-pig.
24	XII	Other cases of inherited mutilations.
	Vol. II
43	XIII	An additional case of reversion due to a cross.
72	XIV	Inheritance as limited by sex.
105	XVI	Two varieties of maize which cannot be crossed.
120	XVII	Some additional facts on the advantages of cross-breeding in animals.
123	XVII	Discussion on the effects of the close interbreeding in the case of man.
135 to 141	XVII	Additional cases of plants sterile with pollen from the same plant.
149	XVIII	Mr. Sclater on the infertility of animals under confinement.
152	XVIII	The Aperea a distinct species from the Guinea-pig.
230	XXI	Prof. Jäger on hawks killing light-coloured pigeons.
273	XXIII	Prof. Wisemann on the effects of isolation in the development of species.
281	XXIII	The direct action of the conditions of life in causing variation.
317	XXIV	Mr. Romanes on rudimentary parts.
324 to 328	XXV	Some additional cases of correlated variability.
339	XXVI	On Geoffrey St. Hilaire’s law of “soi pour soi.”
357 to 404	XXVII	The chapter on Pangenesis has been largely altered and re-modelled; but the essential principles remain the same.