United States or Kenya ? Vote for the TOP Country of the Week !
The author makes here an abrupt transition to the eastern coast of Africa, and calls it the country of the Zinges; congeneric with the country of Zanguebar, and including Azania, Ajen, and Adel, on the north; and Inhambane, Sabia, Sofala, Mocaranga, Mozambique, and Querimba, to the south; all known to, and frequented by the Arabs.
M. De Candolle has expended a vast deal of ingenuity to show that the various members of this old and ancestrally-knotty family have all descended from two or three of the hardier varieties. He arrives at this conclusion from a geographical survey of what he would call the "whole field of distribution," and "the probable historical connection between these congeneric species."
Suffice it to say, that he frankly accepts the inferences derived from the whole course of observation, and contemplates a probable historical connection between congeneric species.
Next to the nomadic nations of Western Scythia, who encountered and baffled the arms of Darius, King of Persia, under the general name of Scythians, who were perhaps congeneric, or the same with those afterwards known by the name of Goths, the dreaded name of the Huns became known to the declining Roman Empire.
In the present essay, not only the distribution but the origin of congeneric species is regarded as something derivative; whether derived by slow and very gradual changes in the course of ages, according to Darwin, or by a sudden, inexplicable change of their tertiary ancestors, as conceived by Heer, De Candolle hazards no opinion.
The Quercus robur may furnish the maximum test to-day, but a few concealed pockets of nature may bring some other variety of the congeneric species to the front to-morrow, requiring M. De Candolle to correct his classification.
In practical action opium affects as large an area of nervous surface, attacks it with as much intensity, and changes it in as many ways as its complexity would lead us to expect. I have pointed out the existence in opium of a convulsive poison congeneric with brucia. The other chief active alkaloids, five in number, are those which specially possess the cumulative property.
Word Of The Day