Edward Stern & Co. This is a very small book of about fifty pages, but is intended to give an insight into the great science of chemistry. Those who have not time or inclination to go further, as may be the case with many horticulturists, can stop when they get through with this, and yet feel that they know enough to understand what chemistry means, and to converse intelligently in a general way about it; while those who intend to go into the study in detail, will find it just the thing to encourage them along. Dr. Leffman is assistant Professor of Chemistry in the Philadelphia High School, and has had good experience as to the best methods of teach-in"; his favorite science.