The Icyball was a commercially sold refridgeration system that had no moving parts and was powered by a heat source. Perfect for on the road cooling, or backwater farms with no electricity. This page discusses a home built modern version.
[2005 Jun 15] [/do-it-yourself/historical-recreation] [#]
A simple to make and historically very popular ink, now the bane of archivists due to its strong corrosive acidity. This site is primarily aimed at archivist, but has this side bar on modern translations of traditional iron gall recipes.
[2004 Apr 28] [/do-it-yourself/historical-recreation] [#]
Mechanical Television in Colour
This hobbiest has recreated a mechanical television (a moving light is rapidly turned on and off by radio signal to create an image), put a pair of eye holes in for stereoscopic images, added spinning RGB filters to add color, and built a mechanical camera too.
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