The | The 1859 1860 1861 1866 1869 |
| These facts are explained by the above 1872 |
| two principles above given, namely that variations do not generally supervene at a very early age, and that they are inherited at a corresponding age whatever that may have been, seem to me to 1866 |
| two principles above given seem to me to 1859 1860 1861 |
| above two principles 1869 |
| two principles. 1872 |
| explain 1859 1860 1861 1866 1869 | explain 1872 |
| these 1859 1860 1861 1866 1869 | these 1872 |
| several facts regarding the later developmental stages of our domestic varieties. 1866 |
| OMIT 1872 |
| facts in regard to the later embryonic stages of our domestic varieties. Fanciers select their horses, dogs, and pigeons, for breeding, when they are nearly grown up: they are indifferent whether the desired qualities and structures have been acquired earlier or later in life, if the full-grown animal possesses them. 1859 1860 1861 |
| facts. Fanciers select for breeding their dogs, horses, pigeons, &c., when nearly grown up: they are indifferent whether the desired qualities are acquired earlier or later in life, if the full-grown animal possesses them. 1869 |
| Fanciers select their horses, dogs, and pigeons, for breeding, when they are nearly grown up: they are indifferent whether the desired qualities and structures have been 1866 |
| And the cases just given, more especially that of pigeons, seem to show that the characteristic differences which give value to each breed, and which have been 1859 1860 1861 |
| And the cases just given, more especially that of pigeons, show that the characteristic differences which give value to the breeds and which have been 1869 |
| Fanciers select their dogs, horses, pigeons, &c., for breeding, when nearly grown up: they are indifferent whether the desired qualities are 1872 |
| acquired earlier or later in life, if the full-grown animal possesses them. 1866 1872 |
| accumulated by man's selection, have not generally first appeared at an early period of life, and have been inherited by the offspring at a corresponding not early period. 1859 1861 |
| accumulated by mans selection, have not generally first appeared at an early period of life, and have been inherited by the offspring at a corresponding not early period. 1860 |
| accumulated by mans selection, have not generally appeared at a very early period of life, and have been inherited at a corresponding not early period. 1869 |
| And 1866 1872 | | But 1859 1860 1861 1869 |
| cases 1866 1872 | | case 1859 1860 1861 1869 |
| just given, more especially that of pigeons, seem to show that 1866 |
| of the short-faced tumbler, which when twelve hours old had acquired its proper proportions, proves that this is not the universal rule; for here 1859 1860 1861 |
| of the short-faced tumbler, which when twelve hours old possessed its proper characters, proves that this is not the universal rule; for here 1869 |
| just given, more especially that of the pigeons, show that 1872 |
| which give value to each breed, and which 1866 |
| must either have appeared at an earlier period than usual, or, if not so, the differences must 1859 1860 1861 1869 |
| which 1872 |
| accumulated by man's selection, have not generally first appeared 1866 |
| inherited, not at the corresponding, but 1859 1860 1861 |
| inherited, not at a corresponding, but 1869 |
| accumulated by man's selection, and which give value to his breeds, do not generally appear 1872 |
| an 1859 1860 1861 1866 1869 | | a very 1872 |
| early period of life, and have been inherited by the offspring at a corresponding not early period. 1866 |
| earlier age. 1859 1860 1861 1869 |
| early period of life, and are inherited at a corresponding not early period. 1872 |
| had acquired 1866 | | possessed 1872 |
| proportions, 1866 | | characters, 1872 |
|
Now let us apply these
facts and the above two principles | facts and the above two principles 1866 |
| facts and the above two principles— which latter, though not proved true, can be shown to be in some degree probable— 1859 1860 1861 |
| two principles 1869 1872 |
| genus 1859 1860 1861 1866 | | group 1869 1872 |
| on my theory 1859 1860 1861 1866 |
| OMIT 1869 1872 |
| one parent-species, and of which the several new species have become 1859 1860 1861 1866 |
| ancient form and 1869 1872 |
| in accordance with their diverse 1859 1860 1861 1866 |
| for different 1869 1872 |
| steps of 1859 1860 1861 1866 | steps of 1869 1872 |
| variation 1859 1860 1861 1866 | | variations 1869 1872 |
| at a rather late 1859 1860 1861 1866 |
| in the several species at a not early 1869 1872 |
| of the new species of our supposed genus will manifestly tend to 1859 1860 1861 1866 |
| will be left but little modified and will 1869 |
| will have been but little modified, and they will still 1872 |
| adults, 1859 1860 1861 1866 | | adults,— 1869 1872 |
| in 1859 1860 1861 1866 | | with 1869 1872 |
| case 1859 1860 1861 1866 | | breeds 1869 1872 |
| pigeons. 1859 1860 1861 1866 | | the pigeon. 1869 1872 |
| whole families or even 1859 1860 1861 1866 |
| widely distinct structures and to whole 1869 1872 |
|
