31. [Fumigation boat alongside a ship, New York, N.Y.] Publication: [194-?] Subject(s): United States. Public Health Service.
32. [Loading material onto a fumigation truck] Publication: 1951 Subject(s): United States. Public Health Service.
33. [Fumigation, opening HCN discards, New York, N.Y.] Publication: [194-?] Subject(s): United States. Public Health Service.
34. [Spraying gas under floor, New York, N.Y.] Publication: [194-?] Subject(s): United States. Public Health Service.
35. [HCN Storeroom, transferring liquid HCN, New York, N.Y.] Publication: [194-?] Subject(s): United States. Public Health Service.
36. [Zyklon poured down a ventilator, cowl removed, New York, N.Y.] Publication: [194-?] Subject(s): United States. Public Health Service.
37. [One safe way of handling a rat, New York, N.Y.] Publication: [194-?] Subject(s): Rodent ControlUnited States. Public Health Service.
38. [Three PHS medical officers in uniform of the early 20th century] Publication: [19--?] Subject(s): United States. Public Health Service.
39. [Men working in a lab, New Orleans, La.] Publication: [between 1914 and 1920] Subject(s): LaboratoriesLaboratory PersonnelUnited States. Public Health Service.
40. [Technician working with a chemical in a dish, New Orleans, La.] Publication: [between 1914 and 1920] Subject(s): LaboratoriesLaboratory PersonnelUnited States. Public Health Service.