7 
Samuel G. Dixon, John TT. Boyce, and Milton J. Rosenau, assisted 
by Dr. E. G. Matson and Messrs. Frank E. Wing and Morris Knowles, 
under the patronage of the Russell Sage Foundation. The report 
on the Pittsburg situation has not yet been published, the work is 
still in progress. 
A ver}^ interesting and instructive review of the t3^phoid-fever 
situation in Baltimore, Md., for the four j^ears 1904, 1905, 1906, 
and 1907 is presented by Dr. C. Hampson Jones in the annual report 
of the health department of the cit}" of Baltimore, Md., for 1907. 
We again wish to acknowledge our indebtedness to Dr. William C. 
Woodward, health officer of the District of Columbia, for assistance 
and many courtesies; also, to the authorities of the various hospitals. 
We have again profited by consultation with the advisory board 
of the Hygienic Laboratory. At a recent meeting of the members 
of that board our findings and general conclusions for this report 
were reviewed. 
M. J. Rosenau, 
Director Hygienic Laboratory , Chairman, 
L. L. Lumsdex, 
Passed Assistant Surgeon. 
Joseph H. Kastle, 
Chief of Division of Chemistry, Recorder, 
United States Public Health and Marine- Hospital Service. 
Washington, D. C., April 16, 1909. 
