and it is really surprising to note the endless points in structure and constitution in which the varieties and sub-varieties differ slightly from each other.
Domestic races of the same species, also, often have a somewhat monstrous character; by which I mean, that, although differing from each other, and from the other species of the same genus, in several trifling respects, they often differ in an extreme degree in some one part, both when compared one with another, and more especially when compared with all the species in nature to which they are nearest allied.
In regard to ducks and rabbits, the breeds of which differ considerably from each other in structure, I do not doubt that they all have descended from the common wild duck and rabbit.
Lastly, in certain breeds, the males and females have come to differ to a slight degree from each other.
Great as the differences are between the breeds of pigeons, I am fully convinced that the common opinion of naturalists is correct, namely, that all have descended from the rock-pigeon (Columba livia), including under this term several geographical races or sub-species, which differ from each other in the most trifling respects.
If this view is correct, a general idea differs
from a vague one in a way analogous to that in which a memory-image differs
from an imagination-image.
Research Laboratory, the abundances measured with the Lockheed-built X-ray polychromator (XRP) aboard the Solar Maximum Mission satellite differ
in different parts of the sun, sometimes varying even from minute to minute.
Because these forward-looking statements involve risks and uncertainties, there are important factors that could cause actual results to differ
materially from those expressed or implied by these forward-looking statements, including, but not limited to, those factors set forth under Item 1A , Risk Factors , in our Annual Report on Form 10-K and those other risks and uncertainties detailed in the Company's periodic reports and registration statements filed with the Securities and Exchange Commission.