Chapter IV: 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

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.