The Bacteriology and Etiology of Oriental Plague

suspected and real cases of plague of human beings and of rats. When appraising the value of the work as a help to the student of Oriental plague, it is well to remember that the observations which form its basis were made in England and that the author has had no opportunity of studying plague in a country where the disease assumes epidemic proportions. The few cases both in man and in rat which he has seen have been imported from abroad into one or other of the seaports of Great Britain. The bulk of the observations described by the author are of the nature of experiments, done in the laboratory with cultures of varying degrees of virulence, and any conclusious which he makes as regards plague iu nature are drawn from such observations.