ETHERS
| Date | Clue |
|---|---|
| 2024-05-31 | They'll knock you out |
| 2018-10-09 | Anesthetics of old |
| 2015-07-19 | Liquids that burn easily |
| 2009-07-05 | Early anesthetics |
| 2008-10-17 | Organic compounds used as solvents |
| 2005-10-23 | Bygone numbers |
| 2005-03-17 | Ethyl oxides |
| 2003-06-05 | Some solvents |
| 2002-01-01 | Industrial solvents |
| 2001-08-01 | They'll knock you out |
| 2000-05-25 | Early anesthetics |
| 1997-04-19 | Some liquid solvents |
| 1997-04-05 | Some anesthetics |
| 1996-10-05 | Common solvents |
| 1994-03-20 | They can knock you out |