...groups of disciplines have at all times overmastered other disciplines in the great battle for science. Of the many twigs which flourished when the tree was...now grown into great branches, yet survive and bear the other branches. But historians of ideas have very often tended to clip back this lush landscape...

...and those produced during each former year may represent the long succession of extinct species. . . The limbs divided into great branches, and these into...and living species in groups subordinate to groups. . . From the first growth of the tree, many a limb and branch has decayed and dropped off, and these...

...was young, budding twigs ; and this connection of the former and present buds by ramifying brandies, may well represent the classification of all extinct...now grown into great branches, yet survive and bear the other branches, go with the species which lived during long-past geological periods, very few have...