Methods of Animal Experimentation, Volume III, compiles methods of animal experimentation in a variety of fields so that the researcher might have a reference that would allow him to incorporate other techniques in his research studies. The methods described represent only the most efficient ways known to date for using animals to gain research information. They are not, however, ""standard methods"" for research in which each experiment seeks or confirms new information by another means. The largest portion of this volume is devoted to behavioral science because of the growing importance of this field in two respects. First, it is an important consideration in all experiments in which animals are used repeatedly. Second, the use of higher animals in comparative behavioral research offers much toward the solution of disease problems of man related to behavior and perhaps even clues to his social interactions. A chapter by an author with extensive experiences with dolphins helps us judge how this animal may be used, and warns of the many problems incurred in research using any of the marine mammals. Other chapters cover dental research on animals, fetal surgery and physiological measurements in very young animals, and microsurgery.