This guide to the use of the microscope is one of a series made up of numerous publications in the agricultural, botanic and zoological sciences. The reader is conducted through chapters beginning with hand magnifiers to others in which twin-objective binocular and monobjective binocular microscopes are considered. There are also chapters on illumination, light filters, condensers, objectives, photography, drawing, testing and care of the microscope. Occasional references are made to microscopes manufactured by particular firms, but in a totally neutral attitude. Practicing physicians, students, and investigators in medicine and other biologic sciences will find many useful suggestions in obtaining maximum efficiency from the microscopes they use. Methods are described whereby more perfect images are possible with different combinations of adjustments of the many accessories with which modern microscopes are so bountifully equipped. The author's style is crisp, simple, and satisfactorily authoritative. The book has a convenient size and, supplementing other