Getting type rated in a DC-7.
Can You Transport Mercury By Aircraft?
The Amazing Rusting Aluminum Popular Science Column by Theodore Gray.
Answer; NO, you are not allowed to take thermometers or any form of mercury on an aircraft. If spilled, it’s possible the aircraft could rust away before you could land.;
Locheed Martin: P-791 Hybrid Airship
An interesting flying machine.
Locheed’s site:P-791 Hybrid Airship