Toolbox: Blowtorch and Hammer [DVD]
There are few tools with as interesting a history as the blowtorch, and this documentary shows how even those cultures that lacked modern technology fashioned instruments that focused the power and energy of intense heat. Among the early cultures showcased are the Egyptians, who figured out how to use reeds in order to direct heat so intense it could melt gold. The filmmakers also show how some early prototypes of the tool utilized alcohol. ~ Perry Seibert
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