[r-t] Challenge to produce new method - Double Helix Royal

Philip Earis Earisp at rsc.org
Wed Feb 27 12:29:44 UTC 2013

"Further to the correspondence on this subject a while ago, Terry Streeter (who is not on this list) has given me permission to repost his latest Differential Royal creation, which may be of interest..."

Excellent!  Great stuff.

"Now to attempt to ring it. How hard can it be?"

We shall see...


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