| Rating | Solver | Clue |
|---|---|---|
| ACOUSTICS | Sound properties | |
| DIACOUSTICS | That branch of natural philosophy which treats of the properties of sound as affected by passing through different mediums; -- called also diaphonics. See the Note under Acoustics. | |
| PERFECT | ...r blemish; without error; mature; whole; pure; sound; right; correct. ... |