(as an aside, yesterday one was processing even older material - glass slides that seem to want to explode if you look at them wrongly, that is to say rather fragile - and nearly as bad as wax phonograph cylinders that I handle as part of one of my things that keep me busy. I am just glad that I don't handle film negatives and have managed to reduce my use of sound reel archiving for a while).
To provide a veneer of aviation to my comment, Ill pass on this (general) link that might be of interest to some. Not everybody here would have been on the first flight
Was This The First In-Flight Movie?