_4th._ _Aid to Professors of Science in Colleges._--Another way by which research might be promoted, would be by giving assistance in the form of a definite amount of additional salary, for the purpose of pure research, to professors and teachers in colleges and institutions; the money being supplied by the State or from the funds of the Institution. In carrying out this plan, it would be necessary to assist only those persons who had already published a good research, and thus proved their ability; and who would engage to devote a definite portion of their time to the labour as a part of their duty. The selection of suitable men might be made with the advice of the Council of the Royal Society. {207} The additional salary should be entirely in the form of remuneration for labour, time, and materials, etc., expended upon research in pure science, and not in effecting inventions. The knowledge obtained should be treated as public property, and be published in the usual manner, and the investigator should not be permitted to sell or patent it. It would be necessary to provide that in case the investigator failed to make or publish a reasonable amount of good research, the additional salary should cease. Publication in the journals of the Royal Society, or in a leading scientific magazine, might be considered a sufficient proof of the satisfactory quality of the labour. It is very desirable that all the higher teachers and professors of science in our educational institution should devote a portion of their time to original research. It would make their lectures more reliable, because research yields experience in the detection of error; whilst there is usually only one way of succeeding in making an experiment, there are always many ways of failing, and in the directions given in books, the latter are usually omitted. It would also induce the students to take a greater interest in the subject, and feel more respect for the teacher. The special excellence of the German system of teaching consists in the union of teaching and original research. This plan of aiding research would induce some of our teachers of science who have not yet made researches, to attempt such labour, it would also develope a superior class of scientific teachers generally; and produce a supply of candidates for professorships of research. {208} A great obstacle to the carrying out of this plan lies in the fact that in consequence of the ignorance of the value of original research by the founders of such Institutions, no definite provision usually exists in the Trust deeds to authorise the Trustees to devote any of the funds to such a purpose.