As the fish were obtained from an abundantly stocked pond only about 300 yards distant, they were transferred about 500 at a time in a wooden tub, the work requiring less than half a day's time of one laborer. The cost in this instance for complete, prompt and continuous control of mosquito production was not more than $1.

PREVALENCE OF POLIOMYELITIS.

The following table gives the number of cases of poliomyelitis (infantile paralysis) reported to the Public Health Service by State health officers from May 29 to September 3, 1921, inclusive. These reports are preliminary and necessarily incomplete.

Poliomyelitis (infantile paralysis)-Number of cases of poliomyelitis occurring in various States, as reported to the Public Health Service by the State health officers in weekly telegraphic or mail reports.

[States omitted are those from which no reports have been received or which have reported no poliomyelitis during the period covered. Leaders indicate that reports were received, but Lo cases of poliomyelitis were reported.]

SEMIANNUAL MEETING OF THE AMERICAN CONFERENCE ON HOSPITAL SERVICE.

The semiannual meeting of the American Conference on Hospital Service will be held September 12-16, 1921, at West Baden, Ind., in conjunction with the meeting of the American Hospital Associa

tion.

The American Conference on Hospital Service, an association organized "for the betterment of hospital service in the United States and Canada," is composed of the following 15 national hospital and health organizations:

American Association of Industrial Physicians and Surgeons.
American Association of Hospital Social Workers.

American Dietetic Association.

American Hospital Association.

American Medical Association.

American Nurses Association.

Association of American Medical Colleges.

Catholic Hospital Association of the United States and
Canada.

Federation of State Medical Boards of the United States.
Medical Department of the United States Army.

Bureau of Medicine, United States Navy.

National League of Nursing Education.

National Tuberculosis Association, Inc.

National Organization for Public Health Nursing.

United States Public Health Service.

The following program has been prepared for Thursday, September 15, 1921:

10 a. m.: Opening Session, Assembly Hall.

Opening remarks. By Frank Billings, M. D., president.

Report of the Hospital Library and Service Bureau. By Donelda R. Hamlin, director, Chicago, Ill.

Report of the Treasurer. By Harry E. Mock, M. D., treasurer, Chicago, Ill. Report of the Trustees. By A. R. Warner, M. D., acting secretary, Chicago, Ill. Report of the special committee to work out the procedure in the determination of policies as to hospital service.

Pa.

2 p. m.: Joint General Session, Convention Hall.

Frank Billings, M. D., president of the Conference, presiding.
American Conference on Hospital Service.

American Hospital Association.

Address by John G. Bowman, chancellor of the University of Pittsburgh, Pittsburgh,

Discussion.

A Method of Increasing Medical Efficiency Within the Hospital.-Frank R. Nuzum, medical director, Santa Barbara Cottege Hospital, Santa Barbara, Calif.

Discussion.

HOSPITAL LIBRARY AND SERVICE BUREAU EXHIBIT.

Realizing the important service which is being rendered by the Hospital Library and Service Bureau, whose headquarters are at 22 East Ontario Street, Chicago, the American Hospital Association has invited the Library to have an exhibit at the convention. The Association has contributed sufficient space to permit of a very comprehensive exhibit.

Since the subject of hospital construction is one upon which the Library has received a great many inquiries, a large portion of the exhibit will be made up of floor plans of hospitals, sanatoriums, health centers, dispensaries, nurses' homes, and allied institutions. Plans of over 300 institutions will be shown. In connection with the plans, it is expected that the list of architects specializing in hospital construction will be freely used. This list, giving, as it does, the institution designed by the various architects, enables the user to form a fairly accurate opinion of the type of work being done by individual architects.

Complete subjects, author, title, and analytical indexes are being prepared of the various hospital journals. Such parts of these indexes as are complete will be included in the exhibit, together with copies of the journals indexed. Complete sets of record forms used in hospitals of various types and sizes will also be shown, together with books on the classification of diseases. A limited number of books, journals, reprints, and pamphlets on the various phases of hospital construction, equipment, and administration will also be shown.

The material being assembled by the Hospital Library and Service Bureau is so varied in type and so extensive that only a very small portion of it can be included in the exhibit. The object in having such an exhibit is rather to bring the hospitals in contact with the service being rendered and to acquaint them more fully with the purpose and scope of the Hospital Library and Service Bureau and the manner in which it functions.

DEATHS DURING WEEK ENDED AUG. 27, 1921.

Summary of information received by telegraph from industrial insurance companies for week ended Aug. 27, 1921, and corresponding week, 1920. (From the Weekly Health Index, Aug. 30, 1921, issued by the Bureau of the Census, Department of Commerce.)

Deaths from all causes in certain large cities of the United States during the week ended Aug. 27, 1921, infant mortality, annual death rate, and comparison with corresponding week of preceding years. (From the Weekly Health Index, Aug. 30, 1921, issued by the Bureau of the Census, Department of Commerce.)

1 Annual rate per 1,000 population.

"A" indicates data for the corresponding week of the years 1913 to 1917, inclusive. "C" indicates date

for the corresponding week of the year 1920,"

Deaths under 1 year per 1,000 births-an annual rate based on deaths under 1 year for the week and estimated births for 1920. Cities left blank are not in the registration area for births.

Data based on statistics of 1915, 1916, and 1917.

PREVALENCE OF DISEASE.

No health department, State or local, can effectively prevent or control disease without knowledge of when, where; and under what conditions cases are occurring.

UNITED STATES.

CURRENT STATE SUMMARIES.

Telegraphic Reports for Week Ended Sept. 3, 1921.

These reports are preliminary and the figures are subject to change when later returns are received by