also carried on, the Research laboratories will compete with educational institutions, established and carried on by private enterprize, and place them at a disadvantage, and thus discourage voluntary effort in the diffusion of science; but by limiting the functions of the professors entirely to pure research, there will be no competition with any private interests, because no persons gain a livelihood entirely by means of such occupation. That the practice of teaching is however of very great use in preparing the mind of a scientific man for research is quite certain, because it compels him to study all parts of his subject, and whilst doing so, many questions for investigation occur to his mind. {204} Many of our most eminent discoverers have also been teachers. But teaching is not a necessary condition of success in research, nor even a necessary preparation for it; the examples of various able discoverers prove this. In some cases discoverers have devoted themselves to teaching, only after having attained high repute in research; in others they have not been teachers at all. Original research itself usually suggests plenty of new subjects of investigation, without the additional ones suggested by teaching. In order that self improvement in a man of science might never stagnate, there should exist a continuous and complete series of steps of preferment, by which the merest beginners in scientific knowledge, might be enabled to attain to the highest scientific position; and finally become wholly occupied in that kind of labour by which their scientific faculties would be developed to their fullest extent, but this last step is wanting. By the proposed plan however a student would become a teacher; the teacher develope into a professor; and a professor might employ for a period a portion of his time in research, and thus become qualified for entire devotion to original investigation and discovery. After a scientific teacher has acquired a thorough knowledge of his subjects, and a high position in his profession, his occupation becomes to him a species of intellectual routine, in which he is continually going through the same courses of lectures and examinations over and over again, and his personal improvement stagnates. But if there was remuneration for research, {205} or there existed some post or employment, to which those who had acquired the ability to investigate might be appointed, there would be an inducement to continued intellectual improvement, and a sphere in which the most valuable faculties of scientific men might be developed for national benefit to their fullest extent.