Dear Crispin, I'll say it was John Fry. Am I close? Jeff On Sunday 07 January 2007 04:06 pm, Crispin Pemberton-Pigott wrote: > PS Many people don't know that the normal biogas digester was invented by a > (different) South African farmer. -- Jeff Davis Somewhere 20 miles south of Lake Erie, USA http://www.velocity.net/~jeff0124