Imagine airline travel back in the 1930s. The following instructions are from one of the first manuals for flight attendants:
1. Keep the clock and altimeter wound up.
2. Carry a railroad timetable in case the plane is grounded.
3. Warn the passengers against throwing their cigars and cigarettes out the windows.
4. Keep an eye on passengers when they go to the lavatory to be sure they don’t mistakenly go out
the emergency exit.