CHEMICAL MICROSCOPY AND OTHER SUMMER COURSES AT CORNELL COURSES in inorganic, organic, analytical, and and studies of textile and paper fibers. In addition, a physical chemistry will be offered a t Cornell University course in microscopical qualitative inorganic analysis will be offered. By correspondence in advance, persons in a six weeks' Summer Session beginning July 7. not desiring university credit may arrange to cover, in a Instruction in chemical microscopy will also be given, shorter term, those portions of the field most suited to covering micrometry and particle-size determination, their needs. Inquiries should be addressed to C. W. optical studies of crystals and their behavior, lens sys- Mason, Department of Chemistry, Comell University, tems, illumination, ultramicroscopy, photomicrography, Ithaca, New York.
