These tests of Poincare showed him to present a striking contrast to Zola, the novelist. Zola's type was found to be characterized by prominent voluntary intellectual activity, clearly conscious and intense, concentrated effort, with no tendency to perseveration of ideas after cessation of work. His thought, as disclosed by the tests, was logical, methodical, and seemed preeminently fitted for the work of mathematical deduction. His method of work was quite the opposite of that of Poincare, who, when he met with a difficulty or with a point requiring voluntary effort, abandoned his work or proceeded to another part of it which would develop more spontaneously. The surprising thing was that a methodical, logical and persistent worker, such as Zola, should have become the prince of romance that he was. One might have expected that the mental processes of Poincare, which were shown to be flighty, uncontrolled, spontaneous, unstable and spasmodic, would have particularly fitted him for the activity of the romancer. Instead, they found their outlet in severe mathematical and philosophical creation. Poincare's genius is thus said to be incapable of explanation on the basis of his sensori-motor equipment, his imagination and memory, and the speed or control of his psychic activity. If his case is taken as typical, it suggests the quite unexpected result that tendency to distraction, automatisms, oscillating attention, restlessness, uncontrolled association and reliance on chance syntheses and spontaneous ideas are significant for the type of genius required in mathematics and philosophical speculation. Certainly in Poincare's case they seem to have constituted a definite method of research.