Last night I was reviewing definitions, and happened upon
Chain Reaction in your August 7, 1997 version of the yellow book.
In it, I read
Very Centers and the directly facing Outside dancers do
a Pass Thru as the End of the Center Line Counter Rotate........
^^^
I added a "s" to my 1997 book.
I then took a look at the July 12, 1999 update. In it I found a
handwritten "s" at the end of "End", but it's not clear if it was
in the original printing or if I might have added it myself some
years ago.
Wanted to make sure you are aware of this minor typo so you can fix
it someday, if you haven't already.