SCIENCE.

The most important sciences for the ordinary reader are Physiology, Hygiene, Psychology, Logic, Political Economy, Sociology and the Science of Government, Astronomy, Geology, and Natural History; but an elementary knowledge of all the sciences is very desirable on account of the breadth of mind and grasp of method which result therefrom. The International Scientific Series is very helpful in giving the brief comprehensive treatment of such subjects that is needed for those who are not specialists. The best books in this department are continually changing, because science is growing fast, and the latest books are apt to be fuller and better than the old ones. The best thing that can be done by one who wishes to be sure of obtaining the finest works upon any given subject in the region of scientific research, is to write to a professor who teaches that subject in some good university,—a professor who has not himself written a book on the subject,—and get his judgment on the matter.