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In this paper, the following conclusions were drawn :-

(a.) Insects may harbour the B. pestis.

(b.) Insects, containing plague bacilli, may be the means of disseminating these

germs over indefinite areas,

(c.) The part played by suctorial insects, e.g.,. fleas, bugs, etc., in the spread of

plague, is similar, in all respects, to that of non-suctorial insects, namely, the mechanical conveyance of the infection from place to place.

(d.) The dangers attributed to the bites of suctorial insects, in the spread of

infectious disease, e.g., plague, would appear to be exaggerated.

(e.) In all probability, the spread of all infectious diseases, e.g., plague, cholera,

typhoid fever, etc., by insects is accomplished only indirectly.

(f) The deposition of the B. pestis by insects on foods, clothing, household utensils, etc., is bound to occur in plague infected areas, and this factor is one of no mean epidemiological importance.

5. The Prophylaxis and Prevention of Plague.-Pablished in The Journal of Pre- ventive Medicine.--November, 1905.

In this paper, the following measures were considered necessary in order to deal effec- tively with the disease.

A.-General Prophylaxis.

(a.) The limitation of actual quarantine.

(b.) The avoidance of dogmatic rules and standing orders for health officers.

(c.) The individual treatment of each case according to its merits.

(d.) The employment of competent ship doctors.

(e.) The employment of skilled port health officers, well versed in quarantine matters. These officers, in order to overcome the many duties of their office, should devote the whole of their time to this work.

(f.) The medical examination of passengers and crews of ships in plague infected

ports.

(y.) The medical control over cargo and merchandise from plague infected ports. (h.) The destruction of rats on board ship.

B. Special Prophylaxis.

(a.) The sanitary control of areas supposed to be infected.

(b.) An early recognition of the disease, which is attained through :-

(1.) Compulsory post-mortem examinations.

(2.) Immediate notification of all cases to the sanitary authorities.

(3.) Systematic search in infected districts and neighbourhood for other cases

of the disease and sources of infection.

(4.) The bacteriological examination of rats.

(5.) The provision of opportunities for the study of the disease from all

points of view.

(c.) The isolation of infected persons.

(d.) The medical supervision of relations and contacts.

(e.) The provision of segregation camps.

(f) Wholesale measures for the destruction of rats and other vermin.

(g.) The education of the people, especially in regard to cleanliness, cooking of

food, boiling of water, etc.

(h.) Skilled veterinarian supervision of all food supplies.

(i.) The thorough disinfection of all infected foci. (k.) The thorough cleansing of non-infected districts.