The Mirror CONCEPT is accomplished by executing the 
  definition of the given call and replacing: 
-  Right with Left and vice-versa; and 
-  Beau with Belle and vice-versa. 
At any point where you would normally pass Right-shoulders, pass
  Left-shoulders and vice-versa.  At any point where you would normally use the
  Right-hand, use the Left-hand and vice-versa.  At any point where the Beaus
  do something, the Belles do it and vice-versa.
|  | 
  | Mirror Swing Thru: | Left Swing Thru |  
  | Mirror Flutter Wheel: | Reverse Flutter Wheel |  
  | Mirror Here Comes The Judge: | Sock It To Me |  
  | Mirror Tag The Line: | Pass Left-shoulders instead of Right-shoulders |  
  | Mirror Slide Thru: | Left Pass Thru; Boys 1/4 Left as Girls 1/4 Right |  
  | Mirror Wheel & Deal: | (from a One-Faced Line): The left-side Couple goes in front |  | 
| |   |  |   |  |   |  | before Mirror Wheel & Deal
 |  | half-way |  | after 
 | 
 | 
 When doing the Mirror version of a call in which two dancers end on the
  same spot (such as an odd Tally-Ho) step to Left hands instead of Right hands!
  The Mirror  CONCEPT is more binding than the Right-hand same-spot
  rule. 
 Note: The words Left and Reverse have traditionally been used to
  indicate Mirror (e.g., Left Swing Thru, Reverse Flutter Wheel) but their
  usage is inconsistent.  Dancers may not know what is intended when
  something like 'Left Circle By' is called.  Should one Circle Left the
  first given fraction then Left Touch the next given fraction?  Or,
  since you are normally moving to the Left on a Circle By, should one
  Circle Right the first fraction?  Reverse can also mean
  'In Reverse Order', 
  'Rewind', or have other meanings ('Reverse Stack The Line':
  original Trailers instead of Leaders go across to right hands!).  If we
  only had the choice of using Left or Reverse, what would the Mirror version of 
  Shake & Rattle 
  be called?  The Mirror version of Shakedown is
  called Left Shakedown and the Mirror version of Reverse Split Swap is
  called Split Swap!  The Mirror CONCEPT resolves these
  ambiguities. 
 Hint:  If you can imagine dancing in a mirrored room and executing a
  call normally, your reflection would be dancing the Mirror version of that call. 
 Common misconceptions: A Mirror Pass The Ocean is not a Pass The Sea.  A Mirror
  Pass The Ocean involves a Left-shoulder Pass Thru, whereas a Pass
  The Sea involves a Right-shoulder Pass Thru. 
 Note: For many calls, the Mirror version of the call is the same as the call
  itself.  For example, a Mirror Scoot Back is a Scoot Back (since the definition
  of Scoot Back does not involve Beaus|Belles or Left|Right); Similarly, when
  starting from a Wave, a Mirror Spin The Top is the same as Spin The Top. 
Mirror Circle By fraction By fraction | anything [C3A]:
 From Facing Couples.  Circle Right the first given fraction and Step To A Left-Hand Wave; Arm
  Turn the second given fraction or do the anything call.
  This call has historically been known as Reverse Circle By.
Mirror Recycle [C3A]:
 From Facing Couples.
  Belles Extend and Left-Face U-Turn Back as Beaus Dodge into the Belle's
  original starting position and Veer Right.  
  Ends in a L-H Wave.
  Historically known as Reverse Recycle.
| |   |  |   |  | before Mirror Recycle
 |  | after 
 | 
 | 
Mystic CONCEPT [C4]:
 Center 4 work Mirror as the Outer 4 work normal, and all do the given call.  
  If the call involves the Centers eventually working with the original
  Outsides, then the completion of the call procedes in a normal manner (i.e.,
  the original Centers no longer work 
Mirror).  In this case, it would
  be better if the caller said 
Initially Mystic.