notification of reportable diseases and the smallpox vaccination law;
aids in maintaining tuberculosis clinics and keeps a separate and con-
fidential record of all cases of tuberculosis and of venereal diseases;
maintains venereal disease clinics, directs medical inspection of pub-
lic schools and investigates nuisances. The Chief of this Bureau is also
Director of Health.

Dr. C. H. Halliday, Epidemiologist, investigates the occurrence, distribution
and types of communicable diseases in individuals and communities in the counties
of Maryland, in order that measures for the control of such diseases may be
instituted. The Division studies the sources and routes of infection, assists local
health authorities or family physicians in the diagnosis of communicable diseases
assist, in finding unrecognized or unreported cases and advises in regard to the
proper method for the collection of laboratory specimens. He also assists in
diphtheria, typhoid fever and smallpox immunizations when the latter cannot be
done by private physicians or by local health officers.

Dr. C. W. G. Rohrer, Diagnostician, is responsible for the diagnosis of
cases of communicable diseases, notably those of the exanthematous group. He
acts in an advisory capacity to medical inspectors and other physicians in matters
pertaining to the prevention and further spread of such diseases; he visits places
where an orginal outbreak of a communicable disease exists, establishing the
diagnosis. He interviews victims of mad-dog bites and administers Pasteur treat-
ment. He also classifies deaths by nature and cause, collating and recording
essential data missing from the original death certificates.

The Deputy State Health Officers report to the Director of Health.
The Director supervises the work of the public health nurses, of whom
there are fifty-three, through the Deputy State and County Health
Officers. He is also Chairman of the Oyster Survey Committee and is
in charge of the issuance of permits to operate picnic, tourist, labor,
religious and recreation camps. He aids in the development of full-time
health departments in the counties and public health nursing programs.
Dr. R. H. Riley, Chief, Baltimore, Md.

The Bureau of Bacteriology, assists physicians in the diagnosis,
treatment and prevention of communicable diseases; determines the
sanitary quality of drinking water, milk and other food substances and
drugs; makes immunizing substances, tests the efficiency of operations
for the purification of water and the disinfection of sewage.

The Central Laboratory is located at 2411 North Charles Street,
Baltimore City, with Branch Laboratories at Cumberland, Hurlock,
Frederick and Hagerstown.
Dr. C. A. Perry, Chief Bacteriologist, Baltimore, Md.

The Bureau of Chemistry determines the sanitary quality of drink-
ing waters, of milk and other food substances, determines the legality
of drug products and pharmaceutical and medicinal preparations sold
to the public; assists in testing the efficiency of operations conducted
for the purification of water or for the treatment of sewage; assists
in preventing the adulteration or misbranding of foods; conducts in-
vestigations from time to time which have for their object the im-
provement of analytical methods applicable to drugs, foods, waters and
sewage.
Dr. John C. Krantz, Jr., Chief Chemist, Baltimore, Md.

The Bureau of Sanitary Engineering exercises supervision over the
purity of waters over the State; examines all sewage and water works
projects, approves or amends them, can require local authorities to in-
stall sewerage or water works, or to alter the construction or operation
of these works; exercises supervision over the disposal of trade wastes,
stream pollution in general, and aerial pollution, and prepares plans
and specifications and supervises the construction of water and sewer-
age works at State Institutions.
Mr. Abel Wolman, Chief Engineer, Baltimore, Md.