separate sources
5.To separate the electroencephalogram (EEG) measured on the scalp into the parts generated by deep and shallow electrical sources respectively is a subject of importance both theoretically and clinically, because we can then find in more detail the electrical activities in the deep parts of the brian.
9.they form the mental capital of the present human race,and every separate nation is productive only in the proportion in which it has known how to appropriate these attainments of former generations and to increase them by its own acquirements, in which the natural capabilities of its territory, its extent and geographical position, its population and political power, have been able to develop as completely and symmetrically as possible all sources of wealth within its boundaries, and to extend its moral, intellectual, commercial, and political influence over less advanced nations and especially over the affairs of the world.

