. Typhoid fever; its causation, transmission and prevention . Fig. 7. Diagram Showing the Seasonal Distribution of Typhoid Fever in the United States. (From the U. S. Census Bureau of 1900.) from the deposits left by the tides to persons dwelling orworking near the shores. Mr. D. D. Jackson in areport to the Merchants Association has recently empha-sized the importance of this factor in New York City. 122 TYPHOID Fig. 8. Diagram Showing the Seasonal Distribution of Typhoid Fever inCertain Cities of the United States. DISTRIBUTION OF TYPHOID FEVER. 123 Seasonal Distribution. In the Unit
. Typhoid fever; its causation, transmission and prevention . Fig. 7. Diagram Showing the Seasonal Distribution of Typhoid Fever in the United States. (From the U. S. Census Bureau of 1900.) from the deposits left by the tides to persons dwelling orworking near the shores. Mr. D. D. Jackson in areport to the Merchants Association has recently empha-sized the importance of this factor in New York City. 122 TYPHOID Fig. 8. Diagram Showing the Seasonal Distribution of Typhoid Fever inCertain Cities of the United States. DISTRIBUTION OF TYPHOID FEVER. 123 Seasonal Distribution. In the United States thenormal seasonal distribution of typhoid fever is shownby Fig. 7. June is the month when the disease isusually least abundant. During the summer, it increasesgradually until it attains a maximum in October, then 180160 O140 °130 Eloo 40 20 / _^ / / ^c P, / \ / / F?°. ^^ N, / s J \ \ J / ^ y V y AF ■ER / ^^ V ^ *^-^ ^ TION ^ ^ ^ 2 CD Fig. 9. Diagram Showing the Seasonal Distribution of Typhoid Fever in Albany, N. Y., before and after the Fihration of the Public Water-Supply. it gradually decreases, though with some slight fluctua-tions during the winter and spring months. This normal curve holds approximately for mostrural sections and for cities which are provided withgood, or fairly good, water-supplies. Thus the sea-sonal distribution of typhoid fever in New York Cityfollows the normal curve. In
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