21. [A liquid-ammunition car, San Francisco, Calif.] Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlHorsesRodent ControlSan FranciscoUnited States. Public Health and Marine Hospital Service.
22. [Backyard of a dwelling, San Francisco, Calif.] Publication: [1907 or 1908] Subject(s): San Francisco
23. [Two men dissecting rats nailed to shingles, San Francisco, Calif.] Publication: [between 1907 and 1909] Subject(s): Communicable Disease ControlDissectionLaboratory PersonnelPlague -- prevention & controlSan Francisco
24. [Technician looking through a microscope, San Francisco, Calif.] Publication: 1908 Subject(s): LaboratoriesLaboratory PersonnelSan Francisco
25. Preparing poison bait Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlRodent ControlSan Francisco
26. [U.S. Public Health and Marine Hospital Service workers using pick axes, shovels, and rakes to clean debris from a former backyard rat-nesting area, San Francisco, Calif.] Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlRodent ControlSan FranciscoUnited States. Public Health and Marine Hospital Service.
27. [Enforcing science and health, San Francisco, Calif.] Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlSan FranciscoUnited States. Public Health and Marine Hospital Service.
28. [Six laboratory workers preparing dead rats for examination during the antiplague campaign, San Francisco, Calif.] Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlDissectionLaboratory PersonnelSan Francisco
29. [Health workers at the United States Public Health Marine Hospital Service Headquarters, Fourth Provisional Plague District, San Francisco, Calif.] Publication: [1907] Subject(s): Plague -- prevention & controlSan FranciscoUnited States. Public Health and Marine Hospital Service.
30. S[an] F[rancisco] Plague Campaign 1907-8: "Creating an atmosphere." Sprinkling lime Publication: [1907 or 1908] Subject(s): Communicable Disease ControlPlague -- prevention & controlSan FranciscoUnited States. Public Health and Marine Hospital Service.