Historical clue formulations

• Conductance units — 2024-06-16
• Conductance quantities — 2017-06-04
• Conductance units — 2013-05-13
• Conductance units — 2012-02-29
• Units now called siemens — 2012-02-01
• Anti-resistance units? — 2008-12-06
• Electrical units — 1999-05-27
• Conductance units — 1997-07-01
• Conductance units — 1996-07-27