Just finished reading 'The Knowledge'. Very interesting but there are a few things which seem dubious, confusing or just plain wrong. Is there a list of errata anywhere? If not, I'll look at parts of this forum that pertain to each chapter.
Just tried making my first lump of soap (success!) and part of the Solvay Process (failure... so far!). I love recreating old technologies (when I have the energy). Those are my favourite bits of 'Time Team'
The book ends by asking what knowledge I'd preserve.
I'd preserve how to make black tea!
I'm not sure I'd want to live in a world where I couldn't have a decent cuppa!
(My favourite variety of tea is darjeeling. If civilization collapses, it might be a while before Britain is trading with India again! I might have to do with Tregothnan tea from Cornwall.)