| Answer | Crossword Clue |
|---|---|
| KEROSENE | Fuel in use since 1852. |
| afterburning | reheat, the use of a device to inject fuel into the hot exhaust gases of a turbojet in order to obtain increased thrust |
| afterburnings | AFTERBURNING, reheat, the use of a device to inject fuel into the hot exhaust gases of a turbojet in order to obtain increased thrust |
| TYPEWRITER | Machine in use since the 1860's |
