◆ SpookStack

GIFSON are still on the windows. Just what that material is, I'm not (CCNT'D) sure. But the remaining pieces should be useful for contamina- tion studies. CAFR One other item is the ammonia odor in the head which we dis- covered about the last week in the mission. We weren't sure what was causing it. Bill had changed out the charcoal canister. We disconnected the boot between the charcoal canister and the blower above it and took a sniff of that. We smelled, no ammonia there. When we connected the boot back up to the blower, a very strong ammonia odor came from the blower output. Thus it appears that the source of the smell was the blower unit itself and not the charcoal canister. As we said in our report of it to the ground, we decided that it was tolerable for the rest of. the mission. Therefore, we didn't get into the mode of finding another blower to put in there. I feel that the odor very definitely increased in intensity during the final week of the mission. CARR One other area of unusual events that we reported on the dump tapes was that on occasion we saw some lights flashing outside with very a definite motion relative to ours. We presumed that. they were other pieces of Skylab, or possibly other satellites.. We reported our two or three sightings of that kind as soon as they occurred. We have no special comments concerning them, 7-8