antedating of "clock wise" (1882)

[Joel S. Berson]

And proteins (although I don't know what the technical terms are for the
left- and right-handedness).  I am not sure it is the same kind of twist,
but the "wrong" one in the relevant protein is what leads to mad cow
disease and BSE.

Joel

At 7/11/2005 11:04 AM, you wrote:
>Another context in which direction of spin is significant  is that of
>imparting twist to fiber in in the production of thread or yarn.  These are
>referred to as "Z twist" (right-handed) or "S twist" (left-handed).
>Individual rovings are given a twist in one direction to produce plies and
>then the several requisite plies are twisted in the other direction,
>stabilizing the whole.
>A. Murie