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I read in a knot book, there are over 40 variations of the bowline. This includes the 'right handed and left handed' bowlines and their variations. i.e., right handed inside and outside bowline; left handed inside and outside bowline.
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I don't understand the distinction between "right-/left-handed"
if not meaning "inside/outside" (re end)--sounds like one is
counting mirror images, which doesn't make sense to me (it has
the fun aspect of being denied for a Fig.8, though

). I'll bet
the book however didn't include these:
http://i3.tinypic.com/wjwh1t.jpg.
The IGKT had someone claim a count of some 80 "bowlines", by which
I think he counted knots bearing the name--a rather cheap way
to hoped-for knot fame. It raises the question
What is the
essence, the defining character, of a bowline?. (To which
I answer: the mainline's central, nipping loop.)
*kN*