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—For two or three years the prevalence of this disease has been steadily increasing in India, and during the present season is prevailing, in a severe form, in Egypt.
This event has created no little alarm in the countries of Western Europe, and their governments are taking active quarantine and other sanitary precautions for preventing its introduction into their respective countries. It is probable that the value or efficacy of such measures in preventing the spread of this pestilence from one country to another will receive a fairer test than ever before.
The popular doctrine, both in and out of the profession, is that the disease is caused by some species of organic germ, capable of being transported in various ways from one place to another, more especially along the lines of travel and commerce. There are many facts, however, connected with the history of past epidemics of the disease,