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Old 18th Mar 2018, 11:25
  #19 (permalink)  
Blues&twos
 
Join Date: Sep 2006
Location: South Oxfordshire
Posts: 611
Being an engineer and being on Jet Blast, I had to look it up.

"Ruler" is just a 15th century variation of "rule," which comes, via French, from Latin "regula," which meant a measuring stick, a diminutive derived from "regere," to straighten, lead, or guide

According to the first internet post I saw when I Googled it. So it must be right.

There, I can sleep more soundly tonight.
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