low tech - 2

Wind powered factories: history (and future) of industrial windmills
http://www.lowtechmagazine.com/2009/10/history-of-industrial-windmills.html


Lost knowledge: ropes and knots
http://www.lowtechmagazine.com/2010/06/lost-knowledge-ropes-and-knots.html


Mechanical calculators: computing without electricity
http://www.lowtechmagazine.com/2008/05/computers-antiq.html