Historical clue formulations

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