The previous volumes of this extensive work have already been reviewed in The Journal. Volume VI, just at hand, is fully equal to the previous volumes. It contains numerous short biographic sketches of such physicians as Lister, Malpighi and Murchison. Among the larger subjects discussed are the liver and its diseases, the lungs, lupus, the lymphatic system, malaria, mastoid operations, medical licensing boards, the history of medicine, meningitis, mental diseases, metabolism, the microscope, milk, muscle, myopia, naval hygiene and the naval medical service, nematoda, nephritis, the nose, obesity, obstetrics, occupational diseases, old age, ophthalmology, optometry, organotherapy, otitis media and the ovaries. While these large topics are given extensive consideration, practically no phase of medicine occurring alphabetically in the letters covered by this volume is overlooked. The article on medical licensing boards by Otto V. Huffman is comprehensive, and, needless to state, accurate. The article on malaria is by von Ezdorf.