| Answer | Crossword Clue |
|---|---|
| PERISCOPE | Optical instrument used in trenches. |
| RETICLE | Grid in the eyepiece of an optical instrument |
| SPECULA | Reflectors used in optical instruments. |
| PELORUS | Instrument used in navigation. |
| DATER | Instrument used in postoffice. |
| RADIOMETER | Instrument used in physics. |
| BANJO | Instrument used in hillbilly music |
| STENOTYPE | Instrument used in taking shorthand. |
| STEELGUITAR | Instrument used in Hawaiian music |
| SNAREDRUM | Instrument used in military parade. |
| MARACA | Percussion instrument often used in calypso music |
| BANJO | Stringed instrument used in "Come On Eileen" |
