Interior view of the Apollo 13 Lunar Module LM showing the ''mail box,'' a jury-rigged arrangement which the Apollo 13 astronauts built to use the Command Module CM lithium hydroxide canisters to purge carbon dioxide from the LM. Lithium hydroxide is used to scrub CO2 from the spacecraft's atmosphere. Since there was a limited amount of lithium hydroxide in the LM, this arrangement was rigged up to utilize the canisters from the CM. Original film magazine was labeled JJ, film type was Color SO 168, process ME4 on an Estar thin base. ASA = 160, considered fairly high speed in its' day. Equivilent to a Kodak type 5241 if in a more conventional format.
