| → the whole body of 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → carriers 1859 1860 1861 1866 1869 |
| the former and present state of carrier 1872 |
|
| → with these breeds as now existing 1859 1860 1861 1866 1869 |
| pigeons 1872 |
|
| → I think, clearly 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
|
believed, been chiefly effected by crosses with the
but what concerns us is, that the change has been effected unconsciously and gradually, and yet so effectually, that, though the old Spanish pointer certainly came from Spain, Mr. Borrow has not seen, as I am informed by him, any native dog in Spain like our pointer. |
|
| By a similar process of selection, and by careful training,
→the whole body of
English racehorses have come to surpass in fleetness and size the parent
so that the latter, by the regulations for the
Races, are favoured in the weights
carry. Lord Spencer and others have shown how the cattle of England have increased in weight and in early maturity, compared with the stock formerly kept in this country. By comparing the accounts given in
treatises of
→carriers
and
→with these breeds as now existing
in Britain, India, and Persia, we
→I think, clearly
trace the stages through which they have insensibly passed, and come to differ so greatly from the rock-pigeon. |
|
| Youatt gives an excellent illustration of the effects of a course of selection, which may be considered as
in so far that the breeders could never have
or even
to
the result which ensued — namely, the production of two distinct strains. The two flocks of Leicester sheep kept by Mr. Buckley and Mr. Burgess, as Mr. Youatt remarks, "have been purely bred from the original stock of Mr. Bakewell for upwards of fifty years. There is not a suspicion existing in the mind of any one at all acquainted with the
that the owner of either of them has deviated in any one instance from the pure blood of Mr. Bakewell's flock, and yet the difference between the sheep possessed by these two gentlemen is
|
