Among these high grounds also the gradual narrowing of ridges into sharp, narrow, knife-edged crests and the lowering of these into cols or passes can be admirably studied.
Communication with Spain is afforded by a large number of ports or cols, which are, however, for the most part difficult paths, and only practicable for a few months in the year.
See, for further information on the subject, the article Chronology, and the same heading in the Encyclopedia Biblica, cols.
The leaves, flowers and berries are beneficial in cases of cols and flu, as they expel toxins from the body.