Historical clue formulations

• Extract with a solvent — 2012-09-18
• Dissolve out — 2011-09-09
• Extract with a solvent — 2009-05-27
• Extract, as a chemical from a solution — 2005-07-27
• Rinse, as with a solvent — 2004-11-28
• Rinse, as with a solvent — 2003-11-02
• Remove by dissolving — 1995-01-15
• Use a solvent — 1994-03-06