a number of persons, each doing his special part, can be united and work for one common end. If these brain centers did not exist in man, then there would never be any concert of action, any combined labor among men. We could never have any distinct conception of such a thing. These centers exist in the ants and the bees as well as in the humans.
The model on the preceding page should be compared with the engraving on the next page. This exhibits the general plan of the brain as now understood by scientific men. The faculties have definite lines of action. Two chief lines balance all the others. These two lines form the major and minor axis of an ellipse, as shown in the lower right-hand corner. They reach from front to back and from top to bottom.
Each mental organ consists of a group of microscopic nerve cells at the surface of the brain and of a bundle of fibers which extend from these cells to one of the brain centers. The functions gradually change as we pass from one region to another on the surface.
THE CENTRAL OFFICERS preside at meetings and collective work. They entertain and put motions to vote. They each have a single vote like the members. But they have no veto power as in civilism. They may offer suggestions or make arguments upon motions which originate with officers or members. And they have a right to appoint temporary officers to fill vacancies.
THE PERFECT MODEL. Our mental classification gives us twelve groups and thirty-six faculties. In another place we will give reasons for this analysis of the mind. W e may note here, however, that the