To insure that drinking water during the Apollo missions did not become contaminated with microorganisms, chemical disinfectants were periodically injected into the water supply by the astronauts. A chlorine solution was used for the Command Module. To insert the chlorine astronauts used a specially designed syringe. This item is the knob portion of the syringe system used during the historic Apollo 11 lunar landing mission. NASA transferred it to the Smithsonian in 1970.
Transferred from NASA/JSC; must be offered back to NASA upon deaccession