| |
|
Spanish inventors
|
131207 |
| |
|
Airships of France
|
131212 |
| |
|
Astra-Torres airship
|
131213 |
| |
|
Niagara-vízesés - Niagara Falls
|
131217 |
| |
|
Whirlpool Aero Car
|
131218 |
| |
|
Circumnavigation
|
131225 |
| |
|
Ancient Greek science
|
131275 |
| |
|
Flight computer
|
131244 |
| |
|
E6B
|
131247 |
| |
|
Deltar (Delta Getij Analogon Rekenmachine)
|
131249 |