Position Size - Rumery & Lehman

[Jeff Kittrell <jkit@xxxxxxx>]

I was scanning some old Omega archives and saw some brief discussion on
Ralph Vince's "Optimal f" vs. Rumery & Lehman's "fixed ratio" technique
for scaling position size.  I found some info on Vince's technique but I
was unable to find anything outlining the specific technique/calculation
used by Rumery.  Would anyone be willing to share the specifics of this
technique? Thanks in advance.