Chronic arthritis stands high in the list of human ailments, and it incapacitates great numbers of people. Our knowledge of its nature and cause is lamentably inadequate. Studies in "comparative rheumatology," on how arthritis affects animals and whether such arthritis resembles the type which affects human beings might be supposed to throw some light on the problem. A few reports have been made on the disease as found in domestic animals but no reports have been made on its occurrence among wild animals.
Herein, Fox has reported results of an analysis of 1,749 skeletons and necropsies of animals. Some animals were captive specimens; many were wild animals killed in their natural environment. The material was from several institutions: the Philadelphia Zoological Garden; the Wistar Institute of Anatomy, Philadelphia; the National Museum, Washington; the Wagner Free Institute of Science, Philadelphia; Western Reserve University, Cleveland; the Academy of Natural Sciences, Philadelphia; the